31123222300021 has 4 divisors (see below), whose sum is σ = 31123319352544. Its totient is φ = 31123125247500.

The previous prime is 31123222300013. The next prime is 31123222300061. The reversal of 31123222300021 is 12000322232113.

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 31123222300021 - 2³ = 31123222300013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31123222299965 and 31123222300001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123222300061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48043635 + ... + 48687136.

It is an arithmetic number, because the mean of its divisors is an integer number (7780829838136).

Almost surely, 2^{31123222300021} is an apocalyptic number.

It is an amenable number.

31123222300021 is a deficient number, since it is larger than the sum of its proper divisors (97052523).

31123222300021 is an equidigital number, since it uses as much as digits as its factorization.

31123222300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97052522.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31123222300021 its reverse (12000322232113), we get a palindrome (43123544532134).

The spelling of 31123222300021 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred twenty-two million, three hundred thousand, twenty-one".