21312102403023 has 8 divisors (see below), whose sum is σ = 28423822821168. Its totient is φ = 14204225126784.

The previous prime is 21312102403019. The next prime is 21312102403043. The reversal of 21312102403023 is 32030420121312.

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

It is not a de Polignac number, because 21312102403023 - 2² = 21312102403019 is a prime.

It is a super-2 number, since 2×21312102403023² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21312102402984 and 21312102403002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312102403043) 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, 960772536 + ... + 960794717.

It is an arithmetic number, because the mean of its divisors is an integer number (3552977852646).

Almost surely, 2^{21312102403023} is an apocalyptic number.

21312102403023 is a deficient number, since it is larger than the sum of its proper divisors (7111720418145).

21312102403023 is a wasteful number, since it uses less digits than its factorization.

21312102403023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921570953.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21312102403023 its reverse (32030420121312), we get a palindrome (53342522524335).

The spelling of 21312102403023 in words is "twenty-one trillion, three hundred twelve billion, one hundred two million, four hundred three thousand, twenty-three".