124031122421 has 4 divisors (see below), whose sum is σ = 126371332332. Its totient is φ = 121690912512.

The previous prime is 124031122403. The next prime is 124031122559. The reversal of 124031122421 is 124221130421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124221130421 = 38557 ⋅3221753.

It can be written as a sum of positive squares in 2 ways, for example, as 82777044100 + 41254078321 = 287710^2 + 203111^2 .

It is a cyclic number.

It is not a de Polignac number, because 124031122421 - 2³⁴ = 106851253237 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 (124031122121) 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, 1170104876 + ... + 1170104981.

It is an arithmetic number, because the mean of its divisors is an integer number (31592833083).

Almost surely, 2^124031122421 is an apocalyptic number.

It is an amenable number.

124031122421 is a deficient number, since it is larger than the sum of its proper divisors (2340209911).

124031122421 is an equidigital number, since it uses as much as digits as its factorization.

124031122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340209910.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 124031122421 its reverse (124221130421), we get a palindrome (248252252842).

The spelling of 124031122421 in words is "one hundred twenty-four billion, thirty-one million, one hundred twenty-two thousand, four hundred twenty-one".