21303201023 has 12 divisors (see below), whose sum is σ = 23705857224. Its totient is φ = 19030143600.

The previous prime is 21303201019. The next prime is 21303201037. The reversal of 21303201023 is 32010230312.

It is not a de Polignac number, because 21303201023 - 2² = 21303201019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303200992 and 21303201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303201323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 840113 + ... + 865098.

It is an arithmetic number, because the mean of its divisors is an integer number (1975488102).

Almost surely, 2^21303201023 is an apocalyptic number.

21303201023 is a deficient number, since it is larger than the sum of its proper divisors (2402656201).

21303201023 is a wasteful number, since it uses less digits than its factorization.

21303201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705286 (or 1705255 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21303201023 its reverse (32010230312), we get a palindrome (53313431335).

The spelling of 21303201023 in words is "twenty-one billion, three hundred three million, two hundred one thousand, twenty-three".