124125423421 has 4 divisors (see below), whose sum is σ = 124130766492. Its totient is φ = 124120080352.

The previous prime is 124125423419. The next prime is 124125423451. The reversal of 124125423421 is 124324521421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24009502500 + 100115920921 = 154950^2 + 316411^2 .

It is a cyclic number.

It is not a de Polignac number, because 124125423421 - 2¹ = 124125423419 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 (124125423451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2636536 + ... + 2683201.

It is an arithmetic number, because the mean of its divisors is an integer number (31032691623).

Almost surely, 2^124125423421 is an apocalyptic number.

It is an amenable number.

124125423421 is a deficient number, since it is larger than the sum of its proper divisors (5343071).

124125423421 is an equidigital number, since it uses as much as digits as its factorization.

124125423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343070.

The product of its digits is 15360, while the sum is 31.

Adding to 124125423421 its reverse (124324521421), we get a palindrome (248449944842).

The spelling of 124125423421 in words is "one hundred twenty-four billion, one hundred twenty-five million, four hundred twenty-three thousand, four hundred twenty-one".