21002021302331 has 2 divisors, whose sum is σ = 21002021302332. Its totient is φ = 21002021302330.

The previous prime is 21002021302259. The next prime is 21002021302363. The reversal of 21002021302331 is 13320312020012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002021302331 - 2¹⁰ = 21002021301307 is a prime.

It is a super-2 number, since 2×21002021302331² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21002021302831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501010651165 + 10501010651166.

It is an arithmetic number, because the mean of its divisors is an integer number (10501010651166).

Almost surely, 2^{21002021302331} is an apocalyptic number.

21002021302331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002021302331 is an equidigital number, since it uses as much as digits as its factorization.

21002021302331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21002021302331 its reverse (13320312020012), we get a palindrome (34322333322343).

The spelling of 21002021302331 in words is "twenty-one trillion, two billion, twenty-one million, three hundred two thousand, three hundred thirty-one".