200202202001221 has 4 divisors (see below), whose sum is σ = 228802516572832. Its totient is φ = 171601887429612.

The previous prime is 200202202001203. The next prime is 200202202001287. The reversal of 200202202001221 is 122100202202002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200202202001221 - 2¹⁵ = 200202201968453 is a prime.

It is a super-2 number, since 2×200202202001221² (a number of 29 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 = 200202202001195 and 200202202001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200202202004221) 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, 14300157285795 + ... + 14300157285808.

It is an arithmetic number, because the mean of its divisors is an integer number (57200629143208).

Almost surely, 2^{200202202001221} is an apocalyptic number.

It is an amenable number.

200202202001221 is a deficient number, since it is larger than the sum of its proper divisors (28600314571611).

200202202001221 is an equidigital number, since it uses as much as digits as its factorization.

200202202001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28600314571610.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 200202202001221 its reverse (122100202202002), we get a palindrome (322302404203223).

The spelling of 200202202001221 in words is "two hundred trillion, two hundred two billion, two hundred two million, one thousand, two hundred twenty-one".