23120221431 has 4 divisors (see below), whose sum is σ = 30826961912. Its totient is φ = 15413480952.

The previous prime is 23120221409. The next prime is 23120221447. The reversal of 23120221431 is 13412202132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23120221431 - 2⁶ = 23120221367 is a prime.

It is a super-2 number, since 2×23120221431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23120221398 and 23120221407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120221451) 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 3 ways as a sum of consecutive naturals, for example, 3853370236 + ... + 3853370241.

It is an arithmetic number, because the mean of its divisors is an integer number (7706740478).

Almost surely, 2^23120221431 is an apocalyptic number.

23120221431 is a deficient number, since it is larger than the sum of its proper divisors (7706740481).

23120221431 is an equidigital number, since it uses as much as digits as its factorization.

23120221431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706740480.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 23120221431 its reverse (13412202132), we get a palindrome (36532423563).

The spelling of 23120221431 in words is "twenty-three billion, one hundred twenty million, two hundred twenty-one thousand, four hundred thirty-one".