21231023023 has 8 divisors (see below), whose sum is σ = 24265554048. Its totient is φ = 18196873944.

The previous prime is 21231023017. The next prime is 21231023029. The reversal of 21231023023 is 32032013212.

It is an interprime number because it is at equal distance from previous prime (21231023017) and next prime (21231023029).

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

It is a cyclic number.

It is not a de Polignac number, because 21231023023 - 2⁵ = 21231022991 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 (21231023029) 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 7 ways as a sum of consecutive naturals, for example, 35640 + ... + 209122.

It is an arithmetic number, because the mean of its divisors is an integer number (3033194256).

Almost surely, 2^21231023023 is an apocalyptic number.

21231023023 is a deficient number, since it is larger than the sum of its proper divisors (3034531025).

21231023023 is a wasteful number, since it uses less digits than its factorization.

21231023023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190973.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21231023023 its reverse (32032013212), we get a palindrome (53263036235).

The spelling of 21231023023 in words is "twenty-one billion, two hundred thirty-one million, twenty-three thousand, twenty-three".