23313132021 has 4 divisors (see below), whose sum is σ = 31084176032. Its totient is φ = 15542088012.

The previous prime is 23313132001. The next prime is 23313132067. The reversal of 23313132021 is 12023131332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23313132021 - 2¹³ = 23313123829 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 (23313132001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3885522001 + ... + 3885522006.

It is an arithmetic number, because the mean of its divisors is an integer number (7771044008).

Almost surely, 2^23313132021 is an apocalyptic number.

It is an amenable number.

23313132021 is a deficient number, since it is larger than the sum of its proper divisors (7771044011).

23313132021 is an equidigital number, since it uses as much as digits as its factorization.

23313132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771044010.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 23313132021 its reverse (12023131332), we get a palindrome (35336263353).

The spelling of 23313132021 in words is "twenty-three billion, three hundred thirteen million, one hundred thirty-two thousand, twenty-one".