23123312021 has 16 divisors (see below), whose sum is σ = 24396300288. Its totient is φ = 21888241200.

The previous prime is 23123312011. The next prime is 23123312033. The reversal of 23123312021 is 12021332132.

It is a cyclic number.

It is not a de Polignac number, because 23123312021 - 2¹⁸ = 23123049877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23123311984 and 23123312002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123312011) 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 15 ways as a sum of consecutive naturals, for example, 238166 + ... + 320888.

It is an arithmetic number, because the mean of its divisors is an integer number (1524768768).

Almost surely, 2^23123312021 is an apocalyptic number.

It is an amenable number.

23123312021 is a deficient number, since it is larger than the sum of its proper divisors (1272988267).

23123312021 is a wasteful number, since it uses less digits than its factorization.

23123312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82952.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23123312021 its reverse (12021332132), we get a palindrome (35144644153).

The spelling of 23123312021 in words is "twenty-three billion, one hundred twenty-three million, three hundred twelve thousand, twenty-one".