124420212109 has 4 divisors (see below), whose sum is σ = 124436011360. Its totient is φ = 124404412860.

The previous prime is 124420212073. The next prime is 124420212139. The reversal of 124420212109 is 901212024421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901212024421 = 241 ⋅3739468981.

It is a cyclic number.

It is not a de Polignac number, because 124420212109 - 2²⁵ = 124386657677 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 (124420212139) 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, 7887807 + ... + 7903564.

It is an arithmetic number, because the mean of its divisors is an integer number (31109002840).

Almost surely, 2^124420212109 is an apocalyptic number.

It is an amenable number.

124420212109 is a deficient number, since it is larger than the sum of its proper divisors (15799251).

124420212109 is an equidigital number, since it uses as much as digits as its factorization.

124420212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15799250.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 124420212109 in words is "one hundred twenty-four billion, four hundred twenty million, two hundred twelve thousand, one hundred nine".