21022330031 has 2 divisors, whose sum is σ = 21022330032. Its totient is φ = 21022330030.

The previous prime is 21022330009. The next prime is 21022330039. The reversal of 21022330031 is 13003322012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022330031 - 2²² = 21018135727 is a prime.

It is a super-2 number, since 2×21022330031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21022329991 and 21022330009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022330039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511165015 + 10511165016.

It is an arithmetic number, because the mean of its divisors is an integer number (10511165016).

Almost surely, 2^21022330031 is an apocalyptic number.

21022330031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022330031 is an equidigital number, since it uses as much as digits as its factorization.

21022330031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21022330031 its reverse (13003322012), we get a palindrome (34025652043).

The spelling of 21022330031 in words is "twenty-one billion, twenty-two million, three hundred thirty thousand, thirty-one".