21220010231023 has 2 divisors, whose sum is σ = 21220010231024. Its totient is φ = 21220010231022.

The previous prime is 21220010230981. The next prime is 21220010231039. The reversal of 21220010231023 is 32013201002212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220010231023 - 2²¹ = 21220008133871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220010231093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610005115511 + 10610005115512.

It is an arithmetic number, because the mean of its divisors is an integer number (10610005115512).

Almost surely, 2^{21220010231023} is an apocalyptic number.

21220010231023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220010231023 is an equidigital number, since it uses as much as digits as its factorization.

21220010231023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21220010231023 its reverse (32013201002212), we get a palindrome (53233211233235).

The spelling of 21220010231023 in words is "twenty-one trillion, two hundred twenty billion, ten million, two hundred thirty-one thousand, twenty-three".