131221301122 has 16 divisors (see below), whose sum is σ = 208417582872. Its totient is φ = 61749043200.

The previous prime is 131221301083. The next prime is 131221301203. The reversal of 131221301122 is 221103122131.

It can be written as a sum of positive squares in 4 ways, for example, as 131196808521 + 24492601 = 362211^2 + 4949^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131221301122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355122 + ... + 1448722.

Almost surely, 2^131221301122 is an apocalyptic number.

131221301122 is a deficient number, since it is larger than the sum of its proper divisors (77196281750).

131221301122 is a wasteful number, since it uses less digits than its factorization.

131221301122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134853.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131221301122 its reverse (221103122131), we get a palindrome (352324423253).

The spelling of 131221301122 in words is "one hundred thirty-one billion, two hundred twenty-one million, three hundred one thousand, one hundred twenty-two".