2131031009999 has 16 divisors (see below), whose sum is σ = 2262447396000. Its totient is φ = 2004116688000.

The previous prime is 2131031009959. The next prime is 2131031010013. The reversal of 2131031009999 is 9999001301312.

It is not a de Polignac number, because 2131031009999 - 2²⁸ = 2130762574543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131031009959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5526752 + ... + 5899749.

It is an arithmetic number, because the mean of its divisors is an integer number (141402962250).

Almost surely, 2^{2131031009999} is an apocalyptic number.

2131031009999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2131031009999 is a deficient number, since it is larger than the sum of its proper divisors (131416386001).

2131031009999 is a wasteful number, since it uses less digits than its factorization.

2131031009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11426698.

The product of its (nonzero) digits is 118098, while the sum is 47.

The spelling of 2131031009999 in words is "two trillion, one hundred thirty-one billion, thirty-one million, nine thousand, nine hundred ninety-nine".