23311221221131 has 4 divisors (see below), whose sum is σ = 24063196099264. Its totient is φ = 22559246343000.

The previous prime is 23311221221089. The next prime is 23311221221177. The reversal of 23311221221131 is 13112212211332.

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

It is a cyclic number.

It is not a de Polignac number, because 23311221221131 - 2⁷ = 23311221221003 is a prime.

It is a super-2 number, since 2×23311221221131² (a number of 28 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 = 23311221221096 and 23311221221105.

It is not an unprimeable number, because it can be changed into a prime (23311221221531) 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, 375987439020 + ... + 375987439081.

It is an arithmetic number, because the mean of its divisors is an integer number (6015799024816).

Almost surely, 2^{23311221221131} is an apocalyptic number.

23311221221131 is a deficient number, since it is larger than the sum of its proper divisors (751974878133).

23311221221131 is an equidigital number, since it uses as much as digits as its factorization.

23311221221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751974878132.

The product of its digits is 864, while the sum is 25.

Adding to 23311221221131 its reverse (13112212211332), we get a palindrome (36423433432463).

It can be divided in two parts, 2 and 3311221221131, that added together give a palindrome (3311221221133).

The spelling of 23311221221131 in words is "twenty-three trillion, three hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-one".