23312012021 has 8 divisors (see below), whose sum is σ = 23494557024. Its totient is φ = 23129898480.

The previous prime is 23312011993. The next prime is 23312012039. The reversal of 23312012021 is 12021021332.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23312012021 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 (23312012081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046 + ... + 215928.

It is an arithmetic number, because the mean of its divisors is an integer number (2936819628).

Almost surely, 2^23312012021 is an apocalyptic number.

It is an amenable number.

23312012021 is a deficient number, since it is larger than the sum of its proper divisors (182545003).

23312012021 is a wasteful number, since it uses less digits than its factorization.

23312012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215731.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23312012021 its reverse (12021021332), we get a palindrome (35333033353).

The spelling of 23312012021 in words is "twenty-three billion, three hundred twelve million, twelve thousand, twenty-one".