124155443421 has 12 divisors (see below), whose sum is σ = 179352150172. Its totient is φ = 82762675776.

The previous prime is 124155443417. The next prime is 124155443501. The reversal of 124155443421 is 124344551421.

124155443421 is a `hidden beast` number, since 1 + 2 + 41 + 554 + 43 + 4 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61051491396 + 63103952025 = 247086^2 + 251205^2 .

It is not a de Polignac number, because 124155443421 - 2² = 124155443417 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 (124155444421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530896 + ... + 728121.

Almost surely, 2^124155443421 is an apocalyptic number.

It is an amenable number.

124155443421 is a deficient number, since it is larger than the sum of its proper divisors (55196706751).

124155443421 is a wasteful number, since it uses less digits than its factorization.

124155443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269980 (or 1269977 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 124155443421 its reverse (124344551421), we get a palindrome (248499994842).

The spelling of 124155443421 in words is "one hundred twenty-four billion, one hundred fifty-five million, four hundred forty-three thousand, four hundred twenty-one".