99126781131 has 32 divisors (see below), whose sum is σ = 155957248000. Its totient is φ = 54804587040.

The previous prime is 99126781111. The next prime is 99126781207. The reversal of 99126781131 is 13118762199.

It is not a de Polignac number, because 99126781131 - 2⁷ = 99126781003 is a prime.

It is a super-2 number, since 2×99126781131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99126781111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3513720 + ... + 3541818.

It is an arithmetic number, because the mean of its divisors is an integer number (4873664000).

Almost surely, 2^99126781131 is an apocalyptic number.

99126781131 is a deficient number, since it is larger than the sum of its proper divisors (56830466869).

99126781131 is a wasteful number, since it uses less digits than its factorization.

99126781131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33559.

The product of its digits is 163296, while the sum is 48.

The spelling of 99126781131 in words is "ninety-nine billion, one hundred twenty-six million, seven hundred eighty-one thousand, one hundred thirty-one".