30031231012 has 12 divisors (see below), whose sum is σ = 52689758940. Its totient is φ = 14977014176.

The previous prime is 30031231007. The next prime is 30031231019. The reversal of 30031231012 is 21013213003.

It can be written as a sum of positive squares in 2 ways, for example, as 16636872256 + 13394358756 = 128984^2 + 115734^2 .

It is a super-2 number, since 2×30031231012² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30031231019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9648583 + ... + 9651694.

It is an arithmetic number, because the mean of its divisors is an integer number (4390813245).

Almost surely, 2^30031231012 is an apocalyptic number.

It is an amenable number.

30031231012 is a deficient number, since it is larger than the sum of its proper divisors (22658527928).

30031231012 is a wasteful number, since it uses less digits than its factorization.

30031231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19300670 (or 19300668 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 30031231012 its reverse (21013213003), we get a palindrome (51044444015).

The spelling of 30031231012 in words is "thirty billion, thirty-one million, two hundred thirty-one thousand, twelve".