3840221921225 has 24 divisors (see below), whose sum is σ = 4850530265688. Its totient is φ = 3015201139200.

The previous prime is 3840221921213. The next prime is 3840221921233. The reversal of 3840221921225 is 5221291220483.

It can be written as a sum of positive squares in 12 ways, for example, as 2207625412864 + 1632596508361 = 1485808^2 + 1277731^2 .

It is not a de Polignac number, because 3840221921225 - 2²⁸ = 3839953485769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2058194 + ... + 3452043.

It is an arithmetic number, because the mean of its divisors is an integer number (202105427737).

Almost surely, 2^{3840221921225} is an apocalyptic number.

It is an amenable number.

3840221921225 is a deficient number, since it is larger than the sum of its proper divisors (1010308344463).

3840221921225 is a wasteful number, since it uses less digits than its factorization.

3840221921225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510765 (or 5510760 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 3840221921225 in words is "three trillion, eight hundred forty billion, two hundred twenty-one million, nine hundred twenty-one thousand, two hundred twenty-five".