31021012030 has 32 divisors (see below), whose sum is σ = 57774448800. Its totient is φ = 11978209152.

The previous prime is 31021011977. The next prime is 31021012037. The reversal of 31021012030 is 3021012013.

It is a self number, because there is not a number n which added to its sum of digits gives 31021012030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021012037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2844969 + ... + 2855851.

It is an arithmetic number, because the mean of its divisors is an integer number (1805451525).

Almost surely, 2^31021012030 is an apocalyptic number.

31021012030 is a deficient number, since it is larger than the sum of its proper divisors (26753436770).

31021012030 is a wasteful number, since it uses less digits than its factorization.

31021012030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20748.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31021012030 its reverse (3021012013), we get a palindrome (34042024043).

The spelling of 31021012030 in words is "thirty-one billion, twenty-one million, twelve thousand, thirty".