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12020101 = 40929389
BaseRepresentation
bin101101110110…
…100110000101
3211121200110221
4231312212011
511034120401
61105344341
7204112012
oct55664605
924550427
1012020101
11686a975
1240380b1
13264b1b2
14184c709
1510c67a1
hexb76985

12020101 has 4 divisors (see below), whose sum is σ = 12049900. Its totient is φ = 11990304.

The previous prime is 12020083. The next prime is 12020119. The reversal of 12020101 is 10102021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10102021 = 15436547.

It is an interprime number because it is at equal distance from previous prime (12020083) and next prime (12020119).

It can be written as a sum of positive squares in 2 ways, for example, as 7568001 + 4452100 = 2751^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020101 - 29 = 12019589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14286 + ... + 15103.

It is an arithmetic number, because the mean of its divisors is an integer number (3012475).

Almost surely, 212020101 is an apocalyptic number.

It is an amenable number.

12020101 is a deficient number, since it is larger than the sum of its proper divisors (29799).

12020101 is an equidigital number, since it uses as much as digits as its factorization.

12020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29798.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12020101 is about 3467.0017306024. The cubic root of 12020101 is about 229.0706099834.

Adding to 12020101 its reverse (10102021), we get a palindrome (22122122).

It can be divided in two parts, 12020 and 101, that added together give a palindrome (12121).

The spelling of 12020101 in words is "twelve million, twenty thousand, one hundred one".

Divisors: 1 409 29389 12020101