31121332020002 has 128 divisors (see below), whose sum is σ = 59885125632000. Its totient is φ = 12068417769408.

The previous prime is 31121332019873. The next prime is 31121332020073. The reversal of 31121332020002 is 20002023312113.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 202875743 + ... + 203029085.

It is an arithmetic number, because the mean of its divisors is an integer number (467852544000).

Almost surely, 2^{31121332020002} is an apocalyptic number.

31121332020002 is a deficient number, since it is larger than the sum of its proper divisors (28763793611998).

31121332020002 is a wasteful number, since it uses less digits than its factorization.

31121332020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154085 (or 154071 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31121332020002 its reverse (20002023312113), we get a palindrome (51123355332115).

The spelling of 31121332020002 in words is "thirty-one trillion, one hundred twenty-one billion, three hundred thirty-two million, twenty thousand, two".