124912911917 has 4 divisors (see below), whose sum is σ = 124927736256. Its totient is φ = 124898087580.

The previous prime is 124912911883. The next prime is 124912911919. The reversal of 124912911917 is 719119219421.

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-124912911917 is a prime.

It is a super-2 number, since 2×124912911917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124912911919) 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, 7399523 + ... + 7416384.

It is an arithmetic number, because the mean of its divisors is an integer number (31231934064).

Almost surely, 2^124912911917 is an apocalyptic number.

It is an amenable number.

124912911917 is a deficient number, since it is larger than the sum of its proper divisors (14824339).

124912911917 is an equidigital number, since it uses as much as digits as its factorization.

124912911917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14824338.

The product of its digits is 81648, while the sum is 47.

The spelling of 124912911917 in words is "one hundred twenty-four billion, nine hundred twelve million, nine hundred eleven thousand, nine hundred seventeen".