12122013111021 has 48 divisors (see below), whose sum is σ = 19155877790400. Its totient is φ = 7325724456960.

The previous prime is 12122013110989. The next prime is 12122013111037. The reversal of 12122013111021 is 12011131022121.

It is a happy number.

12122013111021 is a `hidden beast` number, since 121 + 2 + 201 + 311 + 10 + 21 = 666.

It is not a de Polignac number, because 12122013111021 - 2⁵ = 12122013110989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12122013110985 and 12122013111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122013111721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71614930 + ... + 71783996.

It is an arithmetic number, because the mean of its divisors is an integer number (399080787300).

Almost surely, 2^{12122013111021} is an apocalyptic number.

12122013111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12122013111021 is a deficient number, since it is larger than the sum of its proper divisors (7033864679379).

12122013111021 is a wasteful number, since it uses less digits than its factorization.

12122013111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171146 (or 171143 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12122013111021 its reverse (12011131022121), we get a palindrome (24133144133142).

The spelling of 12122013111021 in words is "twelve trillion, one hundred twenty-two billion, thirteen million, one hundred eleven thousand, twenty-one".