131231798122 has 8 divisors (see below), whose sum is σ = 203635548900. Its totient is φ = 63353281824.

The previous prime is 131231798069. The next prime is 131231798161. The reversal of 131231798122 is 221897132131.

It can be written as a sum of positive squares in 2 ways, for example, as 128959273881 + 2272524241 = 359109^2 + 47671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131308547 + ... + 1131308662.

Almost surely, 2^131231798122 is an apocalyptic number.

131231798122 is a deficient number, since it is larger than the sum of its proper divisors (72403750778).

131231798122 is a wasteful number, since it uses less digits than its factorization.

131231798122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262617240.

The product of its digits is 36288, while the sum is 40.

The spelling of 131231798122 in words is "one hundred thirty-one billion, two hundred thirty-one million, seven hundred ninety-eight thousand, one hundred twenty-two".