31031331130100 has 36 divisors (see below), whose sum is σ = 76957701204384. Its totient is φ = 10639313530080.

The previous prime is 31031331130043. The next prime is 31031331130139. The reversal of 31031331130100 is 103113313013.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22165235822 + ... + 22165237221.

It is an arithmetic number, because the mean of its divisors is an integer number (2137713922344).

Almost surely, 2^{31031331130100} is an apocalyptic number.

It is an amenable number.

31031331130100 is an abundant number, since it is smaller than the sum of its proper divisors (45926370074284).

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

31031331130100 is a wasteful number, since it uses less digits than its factorization.

31031331130100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44330473064 (or 44330473057 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 20.

Adding to 31031331130100 its reverse (103113313013), we get a palindrome (31134444443113).

The spelling of 31031331130100 in words is "thirty-one trillion, thirty-one billion, three hundred thirty-one million, one hundred thirty thousand, one hundred".