202102301221 has 4 divisors (see below), whose sum is σ = 202255294444. Its totient is φ = 201949308000.

The previous prime is 202102301213. The next prime is 202102301243. The reversal of 202102301221 is 122103201202.

It is a happy number.

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 113241672196 + 88860629025 = 336514^2 + 298095^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102301221 - 2³ = 202102301213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202102301195 and 202102301204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102305221) 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, 76494630 + ... + 76497271.

It is an arithmetic number, because the mean of its divisors is an integer number (50563823611).

Almost surely, 2^202102301221 is an apocalyptic number.

It is an amenable number.

202102301221 is a deficient number, since it is larger than the sum of its proper divisors (152993223).

202102301221 is a wasteful number, since it uses less digits than its factorization.

202102301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152993222.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202102301221 its reverse (122103201202), we get a palindrome (324205502423).

The spelling of 202102301221 in words is "two hundred two billion, one hundred two million, three hundred one thousand, two hundred twenty-one".