131111112010121 has 4 divisors (see below), whose sum is σ = 131140489364352. Its totient is φ = 131081734655892.

The previous prime is 131111112010111. The next prime is 131111112010157. The reversal of 131111112010121 is 121010211111131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131111112010121 - 2¹⁸ = 131111111747977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131111112010121.

It is not an unprimeable number, because it can be changed into a prime (131111112010111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14688670421 + ... + 14688679346.

It is an arithmetic number, because the mean of its divisors is an integer number (32785122341088).

Almost surely, 2^{131111112010121} is an apocalyptic number.

It is an amenable number.

131111112010121 is a deficient number, since it is larger than the sum of its proper divisors (29377354231).

131111112010121 is an equidigital number, since it uses as much as digits as its factorization.

131111112010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29377354230.

The product of its (nonzero) digits is 12, while the sum is 17.

Adding to 131111112010121 its reverse (121010211111131), we get a palindrome (252121323121252).

The spelling of 131111112010121 in words is "one hundred thirty-one trillion, one hundred eleven billion, one hundred twelve million, ten thousand, one hundred twenty-one".