123312001 has 2 divisors, whose sum is σ = 123312002. Its totient is φ = 123312000.

The previous prime is 123311989. The next prime is 123312023. The reversal of 123312001 is 100213321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 48316401 = 8660^2 + 6951^2 .

It is a cyclic number.

It is not a de Polignac number, because 123312001 - 2¹³ = 123303809 is a prime.

It is not a weakly prime, because it can be changed into another prime (123312061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61656000 + 61656001.

It is an arithmetic number, because the mean of its divisors is an integer number (61656001).

Almost surely, 2^123312001 is an apocalyptic number.

It is an amenable number.

123312001 is a deficient number, since it is larger than the sum of its proper divisors (1).

123312001 is an equidigital number, since it uses as much as digits as its factorization.

123312001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123312001 is about 11104.5936891000. The cubic root of 123312001 is about 497.7391269818.

Adding to 123312001 its reverse (100213321), we get a palindrome (223525322).

The spelling of 123312001 in words is "one hundred twenty-three million, three hundred twelve thousand, one".