124686686421 has 32 divisors (see below), whose sum is σ = 201625251840. Its totient is φ = 75525908400.

The previous prime is 124686686407. The next prime is 124686686489.

124686686421 is a `hidden beast` number, since 1 + 2 + 468 + 66 + 86 + 42 + 1 = 666.

124686686421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 124686686421 - 2⁶ = 124686686357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124686686221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426286 + ... + 656576.

It is an arithmetic number, because the mean of its divisors is an integer number (6300789120).

Almost surely, 2^124686686421 is an apocalyptic number.

124686686421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124686686421 is a deficient number, since it is larger than the sum of its proper divisors (76938565419).

124686686421 is a wasteful number, since it uses less digits than its factorization.

124686686421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232134 (or 232128 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The spelling of 124686686421 in words is "one hundred twenty-four billion, six hundred eighty-six million, six hundred eighty-six thousand, four hundred twenty-one".