121351531113 has 24 divisors (see below), whose sum is σ = 176955251616. Its totient is φ = 80130657600.

The previous prime is 121351531099. The next prime is 121351531127. The reversal of 121351531113 is 311135153121.

121351531113 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 515 + 31 + 113 = 666.

It is an interprime number because it is at equal distance from previous prime (121351531099) and next prime (121351531127).

It is not a de Polignac number, because 121351531113 - 2⁸ = 121351530857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121351531313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10713493 + ... + 10724813.

It is an arithmetic number, because the mean of its divisors is an integer number (7373135484).

Almost surely, 2^121351531113 is an apocalyptic number.

It is an amenable number.

121351531113 is a deficient number, since it is larger than the sum of its proper divisors (55603720503).

121351531113 is a wasteful number, since it uses less digits than its factorization.

121351531113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22565 (or 22562 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

Adding to 121351531113 its reverse (311135153121), we get a palindrome (432486684234).

The spelling of 121351531113 in words is "one hundred twenty-one billion, three hundred fifty-one million, five hundred thirty-one thousand, one hundred thirteen".