21320022330031 has 4 divisors (see below), whose sum is σ = 21321305217000. Its totient is φ = 21318739443064.

The previous prime is 21320022329989. The next prime is 21320022330041. The reversal of 21320022330031 is 13003322002312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21320022330031 - 2¹³ = 21320022321839 is a prime.

It is a super-2 number, since 2×21320022330031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21320022329984 and 21320022330011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320022330041) 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, 641418556 + ... + 641451793.

It is an arithmetic number, because the mean of its divisors is an integer number (5330326304250).

Almost surely, 2^{21320022330031} is an apocalyptic number.

21320022330031 is a deficient number, since it is larger than the sum of its proper divisors (1282886969).

21320022330031 is a wasteful number, since it uses less digits than its factorization.

21320022330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282886968.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21320022330031 its reverse (13003322002312), we get a palindrome (34323344332343).

The spelling of 21320022330031 in words is "twenty-one trillion, three hundred twenty billion, twenty-two million, three hundred thirty thousand, thirty-one".