124125533521 has 32 divisors (see below), whose sum is σ = 143396407296. Its totient is φ = 106333920000.

The previous prime is 124125533491. The next prime is 124125533527. The reversal of 124125533521 is 125335521421.

It is not a de Polignac number, because 124125533521 - 2⁷ = 124125533393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124125533527) 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, 44313321 + ... + 44316121.

It is an arithmetic number, because the mean of its divisors is an integer number (4481137728).

Almost surely, 2^124125533521 is an apocalyptic number.

124125533521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124125533521 is a deficient number, since it is larger than the sum of its proper divisors (19270873775).

124125533521 is a wasteful number, since it uses less digits than its factorization.

124125533521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373.

The product of its digits is 36000, while the sum is 34.

The spelling of 124125533521 in words is "one hundred twenty-four billion, one hundred twenty-five million, five hundred thirty-three thousand, five hundred twenty-one".