201002320031221 has 4 divisors (see below), whose sum is σ = 201003638568844. Its totient is φ = 201001001493600.

The previous prime is 201002320031189. The next prime is 201002320031231. The reversal of 201002320031221 is 122130023200102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190564606776196 + 10437713255025 = 13804514^2 + 3230745^2 .

It is a cyclic number.

It is not a de Polignac number, because 201002320031221 - 2⁵ = 201002320031189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002320031231) 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, 659040120 + ... + 659345041.

It is an arithmetic number, because the mean of its divisors is an integer number (50250909642211).

Almost surely, 2^{201002320031221} is an apocalyptic number.

It is an amenable number.

201002320031221 is a deficient number, since it is larger than the sum of its proper divisors (1318537623).

201002320031221 is a wasteful number, since it uses less digits than its factorization.

201002320031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318537622.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201002320031221 its reverse (122130023200102), we get a palindrome (323132343231323).

The spelling of 201002320031221 in words is "two hundred one trillion, two billion, three hundred twenty million, thirty-one thousand, two hundred twenty-one".