123331001231 has 2 divisors, whose sum is σ = 123331001232. Its totient is φ = 123331001230.

The previous prime is 123331001221. The next prime is 123331001249. The reversal of 123331001231 is 132100133321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123331001231 - 2³⁴ = 106151132047 is a prime.

It is a super-2 number, since 2×123331001231² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123331001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61665500615 + 61665500616.

It is an arithmetic number, because the mean of its divisors is an integer number (61665500616).

Almost surely, 2^123331001231 is an apocalyptic number.

123331001231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123331001231 is an equidigital number, since it uses as much as digits as its factorization.

123331001231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123331001231 its reverse (132100133321), we get a palindrome (255431134552).

The spelling of 123331001231 in words is "one hundred twenty-three billion, three hundred thirty-one million, one thousand, two hundred thirty-one".