123013321987 has 16 divisors (see below), whose sum is σ = 127462809600. Its totient is φ = 118594602720.

The previous prime is 123013321901. The next prime is 123013321999. The reversal of 123013321987 is 789123310321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123013321987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123013322987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12337078 + ... + 12347044.

It is an arithmetic number, because the mean of its divisors is an integer number (7966425600).

Almost surely, 2^123013321987 is an apocalyptic number.

123013321987 is a deficient number, since it is larger than the sum of its proper divisors (4449487613).

123013321987 is a wasteful number, since it uses less digits than its factorization.

123013321987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11466.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 123013321987 in words is "one hundred twenty-three billion, thirteen million, three hundred twenty-one thousand, nine hundred eighty-seven".