31121020101000 has 64 divisors (see below), whose sum is σ = 97097582724480. Its totient is φ = 8298938692800.

The previous prime is 31121020100999. The next prime is 31121020101013. The reversal of 31121020101000 is 10102012113.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5186833684 + ... + 5186839683.

It is an arithmetic number, because the mean of its divisors is an integer number (1517149730070).

Almost surely, 2^{31121020101000} is an apocalyptic number.

31121020101000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31121020101000 is an abundant number, since it is smaller than the sum of its proper divisors (65976562623480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31121020101000 is a wasteful number, since it uses less digits than its factorization.

31121020101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10373673391 (or 10373673377 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 31121020101000 its reverse (10102012113), we get a palindrome (31131122113113).

The spelling of 31121020101000 in words is "thirty-one trillion, one hundred twenty-one billion, twenty million, one hundred one thousand".