6125200021 has 2 divisors, whose sum is σ = 6125200022. Its totient is φ = 6125200020.

The previous prime is 6125200019. The next prime is 6125200049. The reversal of 6125200021 is 1200025216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3081471121 + 3043728900 = 55511^2 + 55170^2 .

It is a cyclic number.

It is not a de Polignac number, because 6125200021 - 2¹ = 6125200019 is a prime.

Together with 6125200019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6125200001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3062600010 + 3062600011.

It is an arithmetic number, because the mean of its divisors is an integer number (3062600011).

Almost surely, 2^6125200021 is an apocalyptic number.

It is an amenable number.

6125200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6125200021 is an equidigital number, since it uses as much as digits as its factorization.

6125200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 6125200021 is about 78263.6570893541. The cubic root of 6125200021 is about 1829.6727714746.

Adding to 6125200021 its reverse (1200025216), we get a palindrome (7325225237).

The spelling of 6125200021 in words is "six billion, one hundred twenty-five million, two hundred thousand, twenty-one".