200202121221 has 8 divisors (see below), whose sum is σ = 266939605344. Its totient is φ = 133466358960.

The previous prime is 200202121183. The next prime is 200202121237. The reversal of 200202121221 is 122121202002.

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

It is not a de Polignac number, because 200202121221 - 2¹⁵ = 200202088453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200202121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200202121241) 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, 129006 + ... + 645791.

It is an arithmetic number, because the mean of its divisors is an integer number (33367450668).

Almost surely, 2^200202121221 is an apocalyptic number.

It is an amenable number.

200202121221 is a deficient number, since it is larger than the sum of its proper divisors (66737484123).

200202121221 is an equidigital number, since it uses as much as digits as its factorization.

200202121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860931.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 200202121221 its reverse (122121202002), we get a palindrome (322323323223).

The spelling of 200202121221 in words is "two hundred billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-one".