21323113020231 has 8 divisors (see below), whose sum is σ = 31015437120384. Its totient is φ = 12923098800120.

The previous prime is 21323113020197. The next prime is 21323113020233. The reversal of 21323113020231 is 13202031132312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21323113020231 - 2⁷ = 21323113020103 is a prime.

It is a super-2 number, since 2×21323113020231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323113020233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323077469971 + ... + 323077470036.

It is an arithmetic number, because the mean of its divisors is an integer number (3876929640048).

Almost surely, 2^{21323113020231} is an apocalyptic number.

21323113020231 is a deficient number, since it is larger than the sum of its proper divisors (9692324100153).

21323113020231 is a wasteful number, since it uses less digits than its factorization.

21323113020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646154940021.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21323113020231 its reverse (13202031132312), we get a palindrome (34525144152543).

The spelling of 21323113020231 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred thirteen million, twenty thousand, two hundred thirty-one".