21022210031 has 2 divisors, whose sum is σ = 21022210032. Its totient is φ = 21022210030.

The previous prime is 21022210021. The next prime is 21022210073. The reversal of 21022210031 is 13001222012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022210031 - 2³⁴ = 3842340847 is a prime.

It is a super-2 number, since 2×21022210031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21022209988 and 21022210015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022210021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511105015 + 10511105016.

It is an arithmetic number, because the mean of its divisors is an integer number (10511105016).

Almost surely, 2^21022210031 is an apocalyptic number.

21022210031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022210031 is an equidigital number, since it uses as much as digits as its factorization.

21022210031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21022210031 its reverse (13001222012), we get a palindrome (34023432043).

The spelling of 21022210031 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, thirty-one".