31231212002 has 16 divisors (see below), whose sum is σ = 48059816832. Its totient is φ = 15216058320.

The previous prime is 31231211959. The next prime is 31231212037. The reversal of 31231212002 is 20021213213.

It is a super-2 number, since 2×31231212002² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183178 + ... + 1209285.

It is an arithmetic number, because the mean of its divisors is an integer number (3003738552).

Almost surely, 2^31231212002 is an apocalyptic number.

31231212002 is a deficient number, since it is larger than the sum of its proper divisors (16828604830).

31231212002 is a wasteful number, since it uses less digits than its factorization.

31231212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392633.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31231212002 its reverse (20021213213), we get a palindrome (51252425215).

The spelling of 31231212002 in words is "thirty-one billion, two hundred thirty-one million, two hundred twelve thousand, two".