123001002431 has 2 divisors, whose sum is σ = 123001002432. Its totient is φ = 123001002430.

The previous prime is 123001002391. The next prime is 123001002493. The reversal of 123001002431 is 134200100321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123001002431 - 2²² = 122996808127 is a prime.

It is a super-2 number, since 2×123001002431² (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 (123001005431) 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, 61500501215 + 61500501216.

It is an arithmetic number, because the mean of its divisors is an integer number (61500501216).

Almost surely, 2^123001002431 is an apocalyptic number.

123001002431 is a deficient number, since it is larger than the sum of its proper divisors (1).

123001002431 is an equidigital number, since it uses as much as digits as its factorization.

123001002431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123001002431 its reverse (134200100321), we get a palindrome (257201102752).

The spelling of 123001002431 in words is "one hundred twenty-three billion, one million, two thousand, four hundred thirty-one".