201013221 has 4 divisors (see below), whose sum is σ = 268017632. Its totient is φ = 134008812.

The previous prime is 201013213. The next prime is 201013229. The reversal of 201013221 is 122310102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (201013213) and next prime (201013229).

It is not a de Polignac number, because 201013221 - 2³ = 201013213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201013197 and 201013206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201013229) 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, 33502201 + ... + 33502206.

It is an arithmetic number, because the mean of its divisors is an integer number (67004408).

Almost surely, 2^201013221 is an apocalyptic number.

It is an amenable number.

201013221 is a deficient number, since it is larger than the sum of its proper divisors (67004411).

201013221 is an equidigital number, since it uses as much as digits as its factorization.

201013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67004410.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 201013221 is about 14177.9131398101. The cubic root of 201013221 is about 585.7894433540.

Adding to 201013221 its reverse (122310102), we get a palindrome (323323323).

The spelling of 201013221 in words is "two hundred one million, thirteen thousand, two hundred twenty-one".