124124510621 has 2 divisors, whose sum is σ = 124124510622. Its totient is φ = 124124510620.

The previous prime is 124124510603. The next prime is 124124510659. The reversal of 124124510621 is 126015421421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63023592025 + 61100918596 = 251045^2 + 247186^2 .

It is an emirp because it is prime and its reverse (126015421421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124124510621 - 2²² = 124120316317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124124410621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62062255310 + 62062255311.

It is an arithmetic number, because the mean of its divisors is an integer number (62062255311).

Almost surely, 2^124124510621 is an apocalyptic number.

It is an amenable number.

124124510621 is a deficient number, since it is larger than the sum of its proper divisors (1).

124124510621 is an equidigital number, since it uses as much as digits as its factorization.

124124510621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 124124510621 in words is "one hundred twenty-four billion, one hundred twenty-four million, five hundred ten thousand, six hundred twenty-one".