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120211112121 = 340070370707
BaseRepresentation
bin110111111110100100…
…1000000000010111001
3102111021201102012212220
41233331021000002321
53432143021041441
6131120233154253
711453641410432
oct1577511000271
9374251365786
10120211112121
1146a88047851
121b36a55b989
13b449b62499
145b653bc489
1531d87a7466
hex1bfd2400b9

120211112121 has 4 divisors (see below), whose sum is σ = 160281482832. Its totient is φ = 80140741412.

The previous prime is 120211112111. The next prime is 120211112129. The reversal of 120211112121 is 121211112021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120211112121 - 25 = 120211112089 is a prime.

It is a super-2 number, since 2×1202111121212 (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120211112121.

It is not an unprimeable number, because it can be changed into a prime (120211112129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20035185351 + ... + 20035185356.

It is an arithmetic number, because the mean of its divisors is an integer number (40070370708).

Almost surely, 2120211112121 is an apocalyptic number.

It is an amenable number.

120211112121 is a deficient number, since it is larger than the sum of its proper divisors (40070370711).

120211112121 is an equidigital number, since it uses as much as digits as its factorization.

120211112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40070370710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 120211112121 its reverse (121211112021), we get a palindrome (241422224142).

The spelling of 120211112121 in words is "one hundred twenty billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-one".

Divisors: 1 3 40070370707 120211112121