121231013013 has 40 divisors (see below), whose sum is σ = 197595780096. Its totient is φ = 73460649600.

The previous prime is 121231012997. The next prime is 121231013063. The reversal of 121231013013 is 310310132121.

121231013013 is a `hidden beast` number, since 1 + 212 + 310 + 130 + 13 = 666.

It is not a de Polignac number, because 121231013013 - 2⁴ = 121231012997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231013063) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9189420 + ... + 9202602.

Almost surely, 2^121231013013 is an apocalyptic number.

It is an amenable number.

121231013013 is a deficient number, since it is larger than the sum of its proper divisors (76364767083).

121231013013 is a wasteful number, since it uses less digits than its factorization.

121231013013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23527 (or 23518 counting only the distinct ones).

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

Adding to 121231013013 its reverse (310310132121), we get a palindrome (431541145134).

The spelling of 121231013013 in words is "one hundred twenty-one billion, two hundred thirty-one million, thirteen thousand, thirteen".