31130221033 has 8 divisors (see below), whose sum is σ = 33096610368. Its totient is φ = 29214906864.

The previous prime is 31130221019. The next prime is 31130221037. The reversal of 31130221033 is 33012203113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31130221033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31130221033.

It is not an unprimeable number, because it can be changed into a prime (31130221037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12767535 + ... + 12769972.

It is an arithmetic number, because the mean of its divisors is an integer number (4137076296).

Almost surely, 2^31130221033 is an apocalyptic number.

It is an amenable number.

31130221033 is a deficient number, since it is larger than the sum of its proper divisors (1966389335).

31130221033 is a wasteful number, since it uses less digits than its factorization.

31130221033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25537583.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31130221033 its reverse (33012203113), we get a palindrome (64142424146).

The spelling of 31130221033 in words is "thirty-one billion, one hundred thirty million, two hundred twenty-one thousand, thirty-three".