31032313122021 has 4 divisors (see below), whose sum is σ = 41376417496032. Its totient is φ = 20688208748012.

The previous prime is 31032313122011. The next prime is 31032313122029. The reversal of 31032313122021 is 12022131323013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31032313122021 - 2²³ = 31032304733413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31032313121982 and 31032313122000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032313122029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5172052187001 + ... + 5172052187006.

It is an arithmetic number, because the mean of its divisors is an integer number (10344104374008).

Almost surely, 2^{31032313122021} is an apocalyptic number.

It is an amenable number.

31032313122021 is a deficient number, since it is larger than the sum of its proper divisors (10344104374011).

31032313122021 is a wasteful number, since it uses less digits than its factorization.

31032313122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10344104374010.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31032313122021 its reverse (12022131323013), we get a palindrome (43054444445034).

The spelling of 31032313122021 in words is "thirty-one trillion, thirty-two billion, three hundred thirteen million, one hundred twenty-two thousand, twenty-one".