131122221224 has 8 divisors (see below), whose sum is σ = 245854164810. Its totient is φ = 65561110608.

The previous prime is 131122221221. The next prime is 131122221239. The reversal of 131122221224 is 422122221131.

It can be written as a sum of positive squares in only one way, i.e., 127399024900 + 3723196324 = 356930^2 + 61018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 131122221224.

It is not an unprimeable number, because it can be changed into a prime (131122221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195138819 + ... + 8195138834.

Almost surely, 2^131122221224 is an apocalyptic number.

It is an amenable number.

131122221224 is a deficient number, since it is larger than the sum of its proper divisors (114731943586).

131122221224 is a wasteful number, since it uses less digits than its factorization.

131122221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16390277659 (or 16390277655 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

Adding to 131122221224 its reverse (422122221131), we get a palindrome (553244442355).

The spelling of 131122221224 in words is "one hundred thirty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-four".