131122180802 has 6 divisors (see below), whose sum is σ = 196684039353. Its totient is φ = 65560834352.

The previous prime is 131122180801. The next prime is 131122180817. The reversal of 131122180802 is 208081221131.

It can be written as a sum of positive squares in 2 ways, for example, as 81979715041 + 49142465761 = 286321^2 + 221681^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=256049.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131122180801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 384074 + ... + 640122.

Almost surely, 2^131122180802 is an apocalyptic number.

131122180802 is a deficient number, since it is larger than the sum of its proper divisors (65561858551).

131122180802 is an frugal number, since it uses more digits than its factorization.

131122180802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512100 (or 256051 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The spelling of 131122180802 in words is "one hundred thirty-one billion, one hundred twenty-two million, one hundred eighty thousand, eight hundred two".