121210331131 has 32 divisors (see below), whose sum is σ = 129794088960. Its totient is φ = 112950867744.

The previous prime is 121210331129. The next prime is 121210331201. The reversal of 121210331131 is 131133012121.

It is a cyclic number.

It is not a de Polignac number, because 121210331131 - 2¹ = 121210331129 is a prime.

It is a super-2 number, since 2×121210331131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121210331099 and 121210331108.

It is not an unprimeable number, because it can be changed into a prime (121210335131) 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, 55019476 + ... + 55021678.

It is an arithmetic number, because the mean of its divisors is an integer number (4056065280).

Almost surely, 2^121210331131 is an apocalyptic number.

121210331131 is a deficient number, since it is larger than the sum of its proper divisors (8583757829).

121210331131 is a wasteful number, since it uses less digits than its factorization.

121210331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 121210331131 its reverse (131133012121), we get a palindrome (252343343252).

The spelling of 121210331131 in words is "one hundred twenty-one billion, two hundred ten million, three hundred thirty-one thousand, one hundred thirty-one".