888201221 has 4 divisors (see below), whose sum is σ = 898181100. Its totient is φ = 878221344.

The previous prime is 888201199. The next prime is 888201229. The reversal of 888201221 is 122102888.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64224196 + 823977025 = 8014^2 + 28705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-888201221 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 (888201229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4989806 + ... + 4989983.

It is an arithmetic number, because the mean of its divisors is an integer number (224545275).

Almost surely, 2^888201221 is an apocalyptic number.

It is an amenable number.

888201221 is a deficient number, since it is larger than the sum of its proper divisors (9979879).

888201221 is an equidigital number, since it uses as much as digits as its factorization.

888201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979878.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 888201221 is about 29802.7049275733. The cubic root of 888201221 is about 961.2517023920.

The spelling of 888201221 in words is "eight hundred eighty-eight million, two hundred one thousand, two hundred twenty-one".