31222320002221 has 4 divisors (see below), whose sum is σ = 31248623558592. Its totient is φ = 31196016445852.

The previous prime is 31222320002219. The next prime is 31222320002327. The reversal of 31222320002221 is 12220002322213.

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 31222320002221 - 2¹ = 31222320002219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31222320002192 and 31222320002201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222320008221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13151776405 + ... + 13151778778.

It is an arithmetic number, because the mean of its divisors is an integer number (7812155889648).

Almost surely, 2^{31222320002221} is an apocalyptic number.

It is an amenable number.

31222320002221 is a deficient number, since it is larger than the sum of its proper divisors (26303556371).

31222320002221 is a wasteful number, since it uses less digits than its factorization.

31222320002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26303556370.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31222320002221 its reverse (12220002322213), we get a palindrome (43442322324434).

The spelling of 31222320002221 in words is "thirty-one trillion, two hundred twenty-two billion, three hundred twenty million, two thousand, two hundred twenty-one".