201979221 has 8 divisors (see below), whose sum is σ = 272714880. Its totient is φ = 132948192.

The previous prime is 201979207. The next prime is 201979231. The reversal of 201979221 is 122979102.

201979221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 201979221 - 2⁶ = 201979157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201979231) 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, 425880 + ... + 426353.

It is an arithmetic number, because the mean of its divisors is an integer number (34089360).

Almost surely, 2^201979221 is an apocalyptic number.

It is an amenable number.

201979221 is a deficient number, since it is larger than the sum of its proper divisors (70735659).

201979221 is an equidigital number, since it uses as much as digits as its factorization.

201979221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852315.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 201979221 is about 14211.9393820829. The cubic root of 201979221 is about 586.7263113357.

The spelling of 201979221 in words is "two hundred one million, nine hundred seventy-nine thousand, two hundred twenty-one".