30131120212 has 24 divisors (see below), whose sum is σ = 55991212200. Its totient is φ = 14138711040.

The previous prime is 30131120207. The next prime is 30131120219. The reversal of 30131120212 is 21202113103.

It can be written as a sum of positive squares in 4 ways, for example, as 14953865796 + 15177254416 = 122286^2 + 123196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131120219) 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, 611089 + ... + 658552.

It is an arithmetic number, because the mean of its divisors is an integer number (2332967175).

Almost surely, 2^30131120212 is an apocalyptic number.

It is an amenable number.

30131120212 is a deficient number, since it is larger than the sum of its proper divisors (25860091988).

30131120212 is a wasteful number, since it uses less digits than its factorization.

30131120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270011 (or 1270009 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30131120212 its reverse (21202113103), we get a palindrome (51333233315).

The spelling of 30131120212 in words is "thirty billion, one hundred thirty-one million, one hundred twenty thousand, two hundred twelve".