21010113323323 has 16 divisors (see below), whose sum is σ = 22363647851520. Its totient is φ = 19669752950400.

The previous prime is 21010113323267. The next prime is 21010113323351. The reversal of 21010113323323 is 32332331101012.

It is a de Polignac number, because none of the positive numbers 2^k-21010113323323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010113323623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4968318 + ... + 8167276.

It is an arithmetic number, because the mean of its divisors is an integer number (1397727990720).

Almost surely, 2^{21010113323323} is an apocalyptic number.

21010113323323 is a deficient number, since it is larger than the sum of its proper divisors (1353534528197).

21010113323323 is a wasteful number, since it uses less digits than its factorization.

21010113323323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201018.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21010113323323 its reverse (32332331101012), we get a palindrome (53342444424335).

The spelling of 21010113323323 in words is "twenty-one trillion, ten billion, one hundred thirteen million, three hundred twenty-three thousand, three hundred twenty-three".