21120313023 has 12 divisors (see below), whose sum is σ = 30508442328. Its totient is φ = 14079597840.

The previous prime is 21120313009. The next prime is 21120313033. The reversal of 21120313023 is 32031302112.

It is not a de Polignac number, because 21120313023 - 2⁸ = 21120312767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120312987 and 21120313005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120313033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284133 + ... + 350673.

It is an arithmetic number, because the mean of its divisors is an integer number (2542370194).

Almost surely, 2^21120313023 is an apocalyptic number.

21120313023 is a deficient number, since it is larger than the sum of its proper divisors (9388129305).

21120313023 is a wasteful number, since it uses less digits than its factorization.

21120313023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101814 (or 101811 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21120313023 its reverse (32031302112), we get a palindrome (53151615135).

The spelling of 21120313023 in words is "twenty-one billion, one hundred twenty million, three hundred thirteen thousand, twenty-three".