123721265707 has 8 divisors (see below), whose sum is σ = 135063469184. Its totient is φ = 112639802688.

The previous prime is 123721265669. The next prime is 123721265737. The reversal of 123721265707 is 707562127321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123721265707 - 2⁷ = 123721265579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123721265737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65184123 + ... + 65186020.

It is an arithmetic number, because the mean of its divisors is an integer number (16882933648).

Almost surely, 2^123721265707 is an apocalyptic number.

123721265707 is a deficient number, since it is larger than the sum of its proper divisors (11342203477).

123721265707 is a wasteful number, since it uses less digits than its factorization.

123721265707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130370229.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 123721265707 in words is "one hundred twenty-three billion, seven hundred twenty-one million, two hundred sixty-five thousand, seven hundred seven".