2201257285921 has 8 divisors (see below), whose sum is σ = 2202264439784. Its totient is φ = 2200250355840.

The previous prime is 2201257285907. The next prime is 2201257285939. The reversal of 2201257285921 is 1295827521022.

It can be written as a sum of positive squares in 4 ways, for example, as 967791607696 + 1233465678225 = 983764^2 + 1110615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2201257285921 - 2⁵ = 2201257285889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201257285021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21476431 + ... + 21578683.

It is an arithmetic number, because the mean of its divisors is an integer number (275283054973).

Almost surely, 2^{2201257285921} is an apocalyptic number.

It is an amenable number.

2201257285921 is a deficient number, since it is larger than the sum of its proper divisors (1007153863).

2201257285921 is a wasteful number, since it uses less digits than its factorization.

2201257285921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111891.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 2201257285921 in words is "two trillion, two hundred one billion, two hundred fifty-seven million, two hundred eighty-five thousand, nine hundred twenty-one".