124112330021 has 4 divisors (see below), whose sum is σ = 126146958444. Its totient is φ = 122077701600.

The previous prime is 124112330011. The next prime is 124112330057. The reversal of 124112330021 is 120033211421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120033211421 = 683 ⋅175744087.

It can be written as a sum of positive squares in 2 ways, for example, as 24246849796 + 99865480225 = 155714^2 + 316015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124112330021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 124112329975 and 124112330002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124112330011) 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, 1017314120 + ... + 1017314241.

It is an arithmetic number, because the mean of its divisors is an integer number (31536739611).

Almost surely, 2^124112330021 is an apocalyptic number.

It is an amenable number.

124112330021 is a deficient number, since it is larger than the sum of its proper divisors (2034628423).

124112330021 is an equidigital number, since it uses as much as digits as its factorization.

124112330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034628422.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 124112330021 its reverse (120033211421), we get a palindrome (244145541442).

It can be divided in two parts, 12411 and 2330021, that added together give a palindrome (2342432).

The spelling of 124112330021 in words is "one hundred twenty-four billion, one hundred twelve million, three hundred thirty thousand, twenty-one".