31130221099 has 8 divisors (see below), whose sum is σ = 31990483008. Its totient is φ = 30270954240.

The previous prime is 31130221093. The next prime is 31130221117. The reversal of 31130221099 is 99012203113.

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

It is a cyclic number.

It is not a de Polignac number, because 31130221099 - 2²⁷ = 30996003371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31130221099.

It is not an unprimeable number, because it can be changed into a prime (31130221093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185107 + ... + 310684.

It is an arithmetic number, because the mean of its divisors is an integer number (3998810376).

Almost surely, 2^31130221099 is an apocalyptic number.

31130221099 is a deficient number, since it is larger than the sum of its proper divisors (860261909).

31130221099 is a wasteful number, since it uses less digits than its factorization.

31130221099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497525.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 31130221099 in words is "thirty-one billion, one hundred thirty million, two hundred twenty-one thousand, ninety-nine".