3125344042021 has 2 divisors, whose sum is σ = 3125344042022. Its totient is φ = 3125344042020.

The previous prime is 3125344042019. The next prime is 3125344042057. The reversal of 3125344042021 is 1202404435213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2509768850625 + 615575191396 = 1584225^2 + 784586^2 .

It is a cyclic number.

It is not a de Polignac number, because 3125344042021 - 2¹ = 3125344042019 is a prime.

Together with 3125344042019, 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 (3125344042421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1562672021010 + 1562672021011.

It is an arithmetic number, because the mean of its divisors is an integer number (1562672021011).

Almost surely, 2^{3125344042021} is an apocalyptic number.

It is an amenable number.

3125344042021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3125344042021 is an equidigital number, since it uses as much as digits as its factorization.

3125344042021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 3125344042021 its reverse (1202404435213), we get a palindrome (4327748477234).

The spelling of 3125344042021 in words is "three trillion, one hundred twenty-five billion, three hundred forty-four million, forty-two thousand, twenty-one".