202331013221 has 4 divisors (see below), whose sum is σ = 202347679500. Its totient is φ = 202314346944.

The previous prime is 202331013197. The next prime is 202331013289. The reversal of 202331013221 is 122310133202.

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 122770348996 + 79560664225 = 350386^2 + 282065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202331013221 is a prime.

It is a super-2 number, since 2×202331013221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202331013193 and 202331013202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202331013121) 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, 8314916 + ... + 8339213.

It is an arithmetic number, because the mean of its divisors is an integer number (50586919875).

Almost surely, 2^202331013221 is an apocalyptic number.

It is an amenable number.

202331013221 is a deficient number, since it is larger than the sum of its proper divisors (16666279).

202331013221 is a wasteful number, since it uses less digits than its factorization.

202331013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666278.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 202331013221 its reverse (122310133202), we get a palindrome (324641146423).

The spelling of 202331013221 in words is "two hundred two billion, three hundred thirty-one million, thirteen thousand, two hundred twenty-one".