23112132221 has 4 divisors (see below), whose sum is σ = 23649623712. Its totient is φ = 22574640732.

The previous prime is 23112132191. The next prime is 23112132227. The reversal of 23112132221 is 12223121132.

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 a cyclic number.

It is not a de Polignac number, because 23112132221 - 2⁶ = 23112132157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23112132193 and 23112132202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23112132227) 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, 268745681 + ... + 268745766.

It is an arithmetic number, because the mean of its divisors is an integer number (5912405928).

Almost surely, 2^23112132221 is an apocalyptic number.

It is an amenable number.

23112132221 is a deficient number, since it is larger than the sum of its proper divisors (537491491).

23112132221 is an equidigital number, since it uses as much as digits as its factorization.

23112132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537491490.

The product of its digits is 288, while the sum is 20.

Adding to 23112132221 its reverse (12223121132), we get a palindrome (35335253353).

The spelling of 23112132221 in words is "twenty-three billion, one hundred twelve million, one hundred thirty-two thousand, two hundred twenty-one".