23221211641 has 4 divisors (see below), whose sum is σ = 23223849984. Its totient is φ = 23218573300.

The previous prime is 23221211639. The next prime is 23221211747. The reversal of 23221211641 is 14611212232.

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 23221211641 - 2¹ = 23221211639 is a prime.

It is a super-2 number, since 2×23221211641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23221211621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305925 + ... + 1323586.

It is an arithmetic number, because the mean of its divisors is an integer number (5805962496).

Almost surely, 2^23221211641 is an apocalyptic number.

It is an amenable number.

23221211641 is a deficient number, since it is larger than the sum of its proper divisors (2638343).

23221211641 is an equidigital number, since it uses as much as digits as its factorization.

23221211641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638342.

The product of its digits is 1152, while the sum is 25.

Adding to 23221211641 its reverse (14611212232), we get a palindrome (37832423873).

The spelling of 23221211641 in words is "twenty-three billion, two hundred twenty-one million, two hundred eleven thousand, six hundred forty-one".