124684716421 has 4 divisors (see below), whose sum is σ = 130105791072. Its totient is φ = 119263641772.

The previous prime is 124684716397. The next prime is 124684716427. The reversal of 124684716421 is 124617486421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124617486421 = 3793 ⋅32854597.

It is a cyclic number.

It is not a de Polignac number, because 124684716421 - 2⁷ = 124684716293 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 (124684716427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2710537291 + ... + 2710537336.

It is an arithmetic number, because the mean of its divisors is an integer number (32526447768).

Almost surely, 2^124684716421 is an apocalyptic number.

It is an amenable number.

124684716421 is a deficient number, since it is larger than the sum of its proper divisors (5421074651).

124684716421 is an equidigital number, since it uses as much as digits as its factorization.

124684716421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421074650.

The product of its digits is 516096, while the sum is 46.

The spelling of 124684716421 in words is "one hundred twenty-four billion, six hundred eighty-four million, seven hundred sixteen thousand, four hundred twenty-one".