124677721117 has 4 divisors (see below), whose sum is σ = 124680943840. Its totient is φ = 124674498396.

The previous prime is 124677721073. The next prime is 124677721123. The reversal of 124677721117 is 711127776421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124677721117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124677721187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1552617 + ... + 1630942.

It is an arithmetic number, because the mean of its divisors is an integer number (31170235960).

Almost surely, 2^124677721117 is an apocalyptic number.

It is an amenable number.

124677721117 is a deficient number, since it is larger than the sum of its proper divisors (3222723).

124677721117 is an equidigital number, since it uses as much as digits as its factorization.

124677721117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222722.

The product of its digits is 230496, while the sum is 46.

The spelling of 124677721117 in words is "one hundred twenty-four billion, six hundred seventy-seven million, seven hundred twenty-one thousand, one hundred seventeen".