21222010022231 has 2 divisors, whose sum is σ = 21222010022232. Its totient is φ = 21222010022230.

The previous prime is 21222010022111. The next prime is 21222010022327. The reversal of 21222010022231 is 13222001022212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222010022231 is a prime.

It is a super-2 number, since 2×21222010022231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222010522231) 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 as a sum of consecutive naturals, namely, 10611005011115 + 10611005011116.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005011116).

Almost surely, 2^{21222010022231} is an apocalyptic number.

21222010022231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222010022231 is an equidigital number, since it uses as much as digits as its factorization.

21222010022231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21222010022231 its reverse (13222001022212), we get a palindrome (34444011044443).

The spelling of 21222010022231 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, twenty-two thousand, two hundred thirty-one".