21002023101331 has 2 divisors, whose sum is σ = 21002023101332. Its totient is φ = 21002023101330.

The previous prime is 21002023101329. The next prime is 21002023101361. The reversal of 21002023101331 is 13310132020012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002023101331 - 2¹ = 21002023101329 is a prime.

It is a super-2 number, since 2×21002023101331² (a number of 27 digits) contains 22 as substring.

Together with 21002023101329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21002023101299 and 21002023101308.

It is not a weakly prime, because it can be changed into another prime (21002023101361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501011550665 + 10501011550666.

It is an arithmetic number, because the mean of its divisors is an integer number (10501011550666).

Almost surely, 2^{21002023101331} is an apocalyptic number.

21002023101331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002023101331 is an equidigital number, since it uses as much as digits as its factorization.

21002023101331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21002023101331 its reverse (13310132020012), we get a palindrome (34312155121343).

The spelling of 21002023101331 in words is "twenty-one trillion, two billion, twenty-three million, one hundred one thousand, three hundred thirty-one".