2042847245221 has 12 divisors (see below), whose sum is σ = 2171417699968. Its totient is φ = 1921497584832.

The previous prime is 2042847245177. The next prime is 2042847245251. The reversal of 2042847245221 is 1225427482402.

It is not a de Polignac number, because 2042847245221 - 2²⁹ = 2042310374309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042847245251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1702101 + ... + 2642506.

Almost surely, 2^{2042847245221} is an apocalyptic number.

It is an amenable number.

2042847245221 is a deficient number, since it is larger than the sum of its proper divisors (128570454747).

2042847245221 is a wasteful number, since it uses less digits than its factorization.

2042847245221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4346268 (or 4346251 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 43.

The spelling of 2042847245221 in words is "two trillion, forty-two billion, eight hundred forty-seven million, two hundred forty-five thousand, two hundred twenty-one".