123031012007 has 2 divisors, whose sum is σ = 123031012008. Its totient is φ = 123031012006.

The previous prime is 123031011979. The next prime is 123031012021. The reversal of 123031012007 is 700210130321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123031012007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123031012007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123031018007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515506003 + 61515506004.

It is an arithmetic number, because the mean of its divisors is an integer number (61515506004).

Almost surely, 2^123031012007 is an apocalyptic number.

123031012007 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031012007 is an equidigital number, since it uses as much as digits as its factorization.

123031012007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 123031012007 its reverse (700210130321), we get a palindrome (823241142328).

The spelling of 123031012007 in words is "one hundred twenty-three billion, thirty-one million, twelve thousand, seven".