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12122021011 = 33493361927
BaseRepresentation
bin10110100101000011…
…10101110010010011
31011021210201110201011
423102201311302103
5144311214133021
65322504551351
7606252323062
oct132241656223
934253643634
1012122021011
115160623891
122423782557
1311b25185c9
1482dd021d9
154ae324de1
hex2d2875c93

12122021011 has 4 divisors (see below), whose sum is σ = 12122416432. Its totient is φ = 12121625592.

The previous prime is 12122020961. The next prime is 12122021017. The reversal of 12122021011 is 11012022121.

12122021011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11012022121 = 47234298343.

It is a cyclic number.

It is not a de Polignac number, because 12122021011 - 215 = 12121988243 is a prime.

It is a super-2 number, since 2×121220210112 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122020982 and 12122021000.

It is not an unprimeable number, because it can be changed into a prime (12122021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147471 + ... + 214456.

It is an arithmetic number, because the mean of its divisors is an integer number (3030604108).

Almost surely, 212122021011 is an apocalyptic number.

12122021011 is a deficient number, since it is larger than the sum of its proper divisors (395421).

12122021011 is an equidigital number, since it uses as much as digits as its factorization.

12122021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395420.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12122021011 its reverse (11012022121), we get a palindrome (23134043132).

The spelling of 12122021011 in words is "twelve billion, one hundred twenty-two million, twenty-one thousand, eleven".

Divisors: 1 33493 361927 12122021011