123642311001 has 24 divisors (see below), whose sum is σ = 181283945472. Its totient is φ = 74902423200.

The previous prime is 123642310993. The next prime is 123642311017. The reversal of 123642311001 is 100113246321.

It is a happy number.

It is not a de Polignac number, because 123642311001 - 2³ = 123642310993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123642311021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 783336 + ... + 927846.

It is an arithmetic number, because the mean of its divisors is an integer number (7553497728).

Almost surely, 2^123642311001 is an apocalyptic number.

123642311001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123642311001 is a deficient number, since it is larger than the sum of its proper divisors (57641634471).

123642311001 is a wasteful number, since it uses less digits than its factorization.

123642311001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146893 (or 146882 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 123642311001 its reverse (100113246321), we get a palindrome (223755557322).

The spelling of 123642311001 in words is "one hundred twenty-three billion, six hundred forty-two million, three hundred eleven thousand, one".