21023202203231 has 2 divisors, whose sum is σ = 21023202203232. Its totient is φ = 21023202203230.

The previous prime is 21023202203197. The next prime is 21023202203303. The reversal of 21023202203231 is 13230220232012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023202203231 - 2³⁰ = 21022128461407 is a prime.

It is a super-2 number, since 2×21023202203231² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21023202203197 and 21023202203206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023202293231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511601101615 + 10511601101616.

It is an arithmetic number, because the mean of its divisors is an integer number (10511601101616).

Almost surely, 2^{21023202203231} is an apocalyptic number.

21023202203231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023202203231 is an equidigital number, since it uses as much as digits as its factorization.

21023202203231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21023202203231 its reverse (13230220232012), we get a palindrome (34253422435243).

The spelling of 21023202203231 in words is "twenty-one trillion, twenty-three billion, two hundred two million, two hundred three thousand, two hundred thirty-one".