31230121221002 has 16 divisors (see below), whose sum is σ = 51104201478624. Its totient is φ = 14195407770000.

The previous prime is 31230121220929. The next prime is 31230121221037. The reversal of 31230121221002 is 20012212103213.

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, 1914524 + ... + 8131767.

It is an arithmetic number, because the mean of its divisors is an integer number (3194012592414).

Almost surely, 2^{31230121221002} is an apocalyptic number.

31230121221002 is a deficient number, since it is larger than the sum of its proper divisors (19874080257622).

31230121221002 is a wasteful number, since it uses less digits than its factorization.

31230121221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187605.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31230121221002 its reverse (20012212103213), we get a palindrome (51242333324215).

The spelling of 31230121221002 in words is "thirty-one trillion, two hundred thirty billion, one hundred twenty-one million, two hundred twenty-one thousand, two".