121331020113 has 24 divisors (see below), whose sum is σ = 176556796416. Its totient is φ = 80288786400.

The previous prime is 121331020073. The next prime is 121331020117. The reversal of 121331020113 is 311020133121.

121331020113 is a `hidden beast` number, since 121 + 331 + 0 + 201 + 13 = 666.

It is not a de Polignac number, because 121331020113 - 2⁸ = 121331019857 is a prime.

It is a super-2 number, since 2×121331020113² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121331020117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 715906 + ... + 869012.

It is an arithmetic number, because the mean of its divisors is an integer number (7356533184).

Almost surely, 2^121331020113 is an apocalyptic number.

It is an amenable number.

121331020113 is a deficient number, since it is larger than the sum of its proper divisors (55225776303).

121331020113 is a wasteful number, since it uses less digits than its factorization.

121331020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153765 (or 153762 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121331020113 its reverse (311020133121), we get a palindrome (432351153234).

The spelling of 121331020113 in words is "one hundred twenty-one billion, three hundred thirty-one million, twenty thousand, one hundred thirteen".