23211122111231 has 2 divisors, whose sum is σ = 23211122111232. Its totient is φ = 23211122111230.

The previous prime is 23211122111209. The next prime is 23211122111249. The reversal of 23211122111231 is 13211122111232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23211122111231 - 2¹⁴ = 23211122094847 is a prime.

It is a super-2 number, since 2×23211122111231² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23211122111197 and 23211122111206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23211122111531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11605561055615 + 11605561055616.

It is an arithmetic number, because the mean of its divisors is an integer number (11605561055616).

Almost surely, 2^{23211122111231} is an apocalyptic number.

23211122111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

23211122111231 is an equidigital number, since it uses as much as digits as its factorization.

23211122111231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

Adding to 23211122111231 its reverse (13211122111232), we get a palindrome (36422244222463).

Subtracting from 23211122111231 its reverse (13211122111232), we obtain a palindrome (9999999999999).

The spelling of 23211122111231 in words is "twenty-three trillion, two hundred eleven billion, one hundred twenty-two million, one hundred eleven thousand, two hundred thirty-one".