131020230220402 has 16 divisors (see below), whose sum is σ = 208098295738200. Its totient is φ = 61654403561728.

The previous prime is 131020230220391. The next prime is 131020230220457. The reversal of 131020230220402 is 204022032020131.

It can be written as a sum of positive squares in 4 ways, for example, as 126936027694921 + 4084202525481 = 11266589^2 + 2020941^2 .

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, 67002133 + ... + 68929864.

Almost surely, 2^{131020230220402} is an apocalyptic number.

131020230220402 is a deficient number, since it is larger than the sum of its proper divisors (77078065517798).

131020230220402 is a wasteful number, since it uses less digits than its factorization.

131020230220402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135960365.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 131020230220402 its reverse (204022032020131), we get a palindrome (335042262240533).

The spelling of 131020230220402 in words is "one hundred thirty-one trillion, twenty billion, two hundred thirty million, two hundred twenty thousand, four hundred two".