201002221091 has 8 divisors (see below), whose sum is σ = 229741983840. Its totient is φ = 172268748288.

The previous prime is 201002221039. The next prime is 201002221093. The reversal of 201002221091 is 190122200102.

It is a happy number.

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

It is not a de Polignac number, because 201002221091 - 2³⁴ = 183822351907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201002221093) 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, 1503806 + ... + 1632003.

It is an arithmetic number, because the mean of its divisors is an integer number (28717747980).

Almost surely, 2^201002221091 is an apocalyptic number.

201002221091 is a deficient number, since it is larger than the sum of its proper divisors (28739762749).

201002221091 is an equidigital number, since it uses as much as digits as its factorization.

201002221091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144973.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 201002221091 its reverse (190122200102), we get a palindrome (391124421193).

The spelling of 201002221091 in words is "two hundred one billion, two million, two hundred twenty-one thousand, ninety-one".