121111212100131 has 32 divisors (see below), whose sum is σ = 195736278608640. Its totient is φ = 73400364734400.

The previous prime is 121111212100111. The next prime is 121111212100147. The reversal of 121111212100131 is 131001212111121.

121111212100131 is a `hidden beast` number, since 1 + 211 + 11 + 212 + 100 + 131 = 666.

It is not a de Polignac number, because 121111212100131 - 2²⁵ = 121111178545699 is a prime.

It is a super-2 number, since 2×121111212100131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121111212100111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65182096 + ... + 67014386.

It is an arithmetic number, because the mean of its divisors is an integer number (6116758706520).

Almost surely, 2^{121111212100131} is an apocalyptic number.

121111212100131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121111212100131 is a deficient number, since it is larger than the sum of its proper divisors (74625066508509).

121111212100131 is a wasteful number, since it uses less digits than its factorization.

121111212100131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054864 (or 2054858 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 121111212100131 its reverse (131001212111121), we get a palindrome (252112424211252).

The spelling of 121111212100131 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred twelve million, one hundred thousand, one hundred thirty-one".