12121113212031 has 32 divisors (see below), whose sum is σ = 17822968422400. Its totient is φ = 7297915695840.

The previous prime is 12121113212029. The next prime is 12121113212099. The reversal of 12121113212031 is 13021231112121.

It is not a de Polignac number, because 12121113212031 - 2¹ = 12121113212029 is a prime.

It is a super-2 number, since 2×12121113212031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12121113211989 and 12121113212007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121113212011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51073501 + ... + 51310278.

It is an arithmetic number, because the mean of its divisors is an integer number (556967763200).

Almost surely, 2^{12121113212031} is an apocalyptic number.

12121113212031 is a deficient number, since it is larger than the sum of its proper divisors (5701855210369).

12121113212031 is a wasteful number, since it uses less digits than its factorization.

12121113212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102383899.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 12121113212031 its reverse (13021231112121), we get a palindrome (25142344324152).

The spelling of 12121113212031 in words is "twelve trillion, one hundred twenty-one billion, one hundred thirteen million, two hundred twelve thousand, thirty-one".