124204151021 has 2 divisors, whose sum is σ = 124204151022. Its totient is φ = 124204151020.

The previous prime is 124204150951. The next prime is 124204151041. The reversal of 124204151021 is 120151402421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123362512900 + 841638121 = 351230^2 + 29011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124204151021 is a prime.

It is a super-2 number, since 2×124204151021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124204151041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62102075510 + 62102075511.

It is an arithmetic number, because the mean of its divisors is an integer number (62102075511).

Almost surely, 2^124204151021 is an apocalyptic number.

It is an amenable number.

124204151021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124204151021 is an equidigital number, since it uses as much as digits as its factorization.

124204151021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 124204151021 its reverse (120151402421), we get a palindrome (244355553442).

The spelling of 124204151021 in words is "one hundred twenty-four billion, two hundred four million, one hundred fifty-one thousand, twenty-one".