221072201 has 16 divisors (see below), whose sum is σ = 266697600. Its totient is φ = 179013888.

The previous prime is 221072197. The next prime is 221072209. The reversal of 221072201 is 102270122.

221072201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221072201 - 2² = 221072197 is a prime.

It is a super-3 number, since 3×221072201³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221072201.

It is not an unprimeable number, because it can be changed into a prime (221072209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49601 + ... + 53873.

It is an arithmetic number, because the mean of its divisors is an integer number (16668600).

Almost surely, 2^221072201 is an apocalyptic number.

It is an amenable number.

221072201 is a deficient number, since it is larger than the sum of its proper divisors (45625399).

221072201 is a wasteful number, since it uses less digits than its factorization.

221072201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 221072201 is about 14868.4969314319. The cubic root of 221072201 is about 604.6601930318.

The spelling of 221072201 in words is "two hundred twenty-one million, seventy-two thousand, two hundred one".