21031230330023 has 4 divisors (see below), whose sum is σ = 21032940059448. Its totient is φ = 21029520600600.

The previous prime is 21031230330001. The next prime is 21031230330053. The reversal of 21031230330023 is 32003303213012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21031230330023 - 2²⁴ = 21031213552807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031230330053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854846261 + ... + 854870862.

It is an arithmetic number, because the mean of its divisors is an integer number (5258235014862).

Almost surely, 2^{21031230330023} is an apocalyptic number.

21031230330023 is a deficient number, since it is larger than the sum of its proper divisors (1709729425).

21031230330023 is a wasteful number, since it uses less digits than its factorization.

21031230330023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709729424.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21031230330023 its reverse (32003303213012), we get a palindrome (53034533543035).

The spelling of 21031230330023 in words is "twenty-one trillion, thirty-one billion, two hundred thirty million, three hundred thirty thousand, twenty-three".