31020131303012 has 12 divisors (see below), whose sum is σ = 54285299695536. Its totient is φ = 15510045675720.

The previous prime is 31020131303011. The next prime is 31020131303017. The reversal of 31020131303012 is 21030313102013.

It is a super-2 number, since 2×31020131303012² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31020131303011) 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, 1175558 + ... + 7963805.

It is an arithmetic number, because the mean of its divisors is an integer number (4523774974628).

Almost surely, 2^{31020131303012} is an apocalyptic number.

It is an amenable number.

31020131303012 is a deficient number, since it is larger than the sum of its proper divisors (23265168392524).

31020131303012 is a wasteful number, since it uses less digits than its factorization.

31020131303012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987898 (or 9987896 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31020131303012 its reverse (21030313102013), we get a palindrome (52050444405025).

The spelling of 31020131303012 in words is "thirty-one trillion, twenty billion, one hundred thirty-one million, three hundred three thousand, twelve".