31310121002 has 4 divisors (see below), whose sum is σ = 46965181506. Its totient is φ = 15655060500.

The previous prime is 31310120917. The next prime is 31310121023. The reversal of 31310121002 is 20012101313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24853837801 + 6456283201 = 157651^2 + 80351^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7827530249 + ... + 7827530252.

Almost surely, 2^31310121002 is an apocalyptic number.

31310121002 is a deficient number, since it is larger than the sum of its proper divisors (15655060504).

31310121002 is a wasteful number, since it uses less digits than its factorization.

31310121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15655060503.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31310121002 its reverse (20012101313), we get a palindrome (51322222315).

The spelling of 31310121002 in words is "thirty-one billion, three hundred ten million, one hundred twenty-one thousand, two".