23331221131 has 2 divisors, whose sum is σ = 23331221132. Its totient is φ = 23331221130.

The previous prime is 23331221129. The next prime is 23331221153. The reversal of 23331221131 is 13112213332.

It is an a-pointer prime, because the next prime (23331221153) can be obtained adding 23331221131 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23331221131 - 2¹ = 23331221129 is a prime.

It is a super-2 number, since 2×23331221131² (a number of 22 digits) contains 22 as substring.

Together with 23331221129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23331221101) 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 as a sum of consecutive naturals, namely, 11665610565 + 11665610566.

It is an arithmetic number, because the mean of its divisors is an integer number (11665610566).

Almost surely, 2^23331221131 is an apocalyptic number.

23331221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

23331221131 is an equidigital number, since it uses as much as digits as its factorization.

23331221131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

Adding to 23331221131 its reverse (13112213332), we get a palindrome (36443434463).

The spelling of 23331221131 in words is "twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand, one hundred thirty-one".