201002221221 has 4 divisors (see below), whose sum is σ = 268002961632. Its totient is φ = 134001480812.

The previous prime is 201002221213. The next prime is 201002221267. The reversal of 201002221221 is 122122200102.

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 a cyclic number.

It is not a de Polignac number, because 201002221221 - 2³ = 201002221213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201002221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002228221) 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, 33500370201 + ... + 33500370206.

It is an arithmetic number, because the mean of its divisors is an integer number (67000740408).

Almost surely, 2^201002221221 is an apocalyptic number.

It is an amenable number.

201002221221 is a deficient number, since it is larger than the sum of its proper divisors (67000740411).

201002221221 is an equidigital number, since it uses as much as digits as its factorization.

201002221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67000740410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201002221221 its reverse (122122200102), we get a palindrome (323124421323).

The spelling of 201002221221 in words is "two hundred one billion, two million, two hundred twenty-one thousand, two hundred twenty-one".