202000221121 has 4 divisors (see below), whose sum is σ = 202047235012. Its totient is φ = 201953207232.

The previous prime is 202000221103. The next prime is 202000221149. The reversal of 202000221121 is 121122000202.

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 39642801025 + 162357420096 = 199105^2 + 402936^2 .

It is a cyclic number.

It is not a de Polignac number, because 202000221121 - 2⁷ = 202000220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202000221721) 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, 23500500 + ... + 23509093.

It is an arithmetic number, because the mean of its divisors is an integer number (50511808753).

Almost surely, 2^202000221121 is an apocalyptic number.

It is an amenable number.

202000221121 is a deficient number, since it is larger than the sum of its proper divisors (47013891).

202000221121 is an equidigital number, since it uses as much as digits as its factorization.

202000221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47013890.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202000221121 its reverse (121122000202), we get a palindrome (323122221323).

The spelling of 202000221121 in words is "two hundred two billion, two hundred twenty-one thousand, one hundred twenty-one".