30131310221 has 12 divisors (see below), whose sum is σ = 32458839840. Its totient is φ = 27959440320.

The previous prime is 30131310203. The next prime is 30131310233. The reversal of 30131310221 is 12201313103.

It is not a de Polignac number, because 30131310221 - 2³⁴ = 12951441037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 30131310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131312221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 713711 + ... + 754748.

It is an arithmetic number, because the mean of its divisors is an integer number (2704903320).

Almost surely, 2^30131310221 is an apocalyptic number.

It is an amenable number.

30131310221 is a deficient number, since it is larger than the sum of its proper divisors (2327529619).

30131310221 is a wasteful number, since it uses less digits than its factorization.

30131310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468564 (or 1468547 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 30131310221 its reverse (12201313103), we get a palindrome (42332623324).

The spelling of 30131310221 in words is "thirty billion, one hundred thirty-one million, three hundred ten thousand, two hundred twenty-one".