200122202001221 has 4 divisors (see below), whose sum is σ = 207022967587500. Its totient is φ = 193221436414944.

The previous prime is 200122202001191. The next prime is 200122202001247. The reversal of 200122202001221 is 122100202221002.

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 77255064144196 + 122867137857025 = 8789486^2 + 11084545^2 .

It is a cyclic number.

It is not a de Polignac number, because 200122202001221 - 2¹⁸ = 200122201739077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200122202001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200122202001121) 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, 3450382793096 + ... + 3450382793153.

It is an arithmetic number, because the mean of its divisors is an integer number (51755741896875).

Almost surely, 2^{200122202001221} is an apocalyptic number.

It is an amenable number.

200122202001221 is a deficient number, since it is larger than the sum of its proper divisors (6900765586279).

200122202001221 is an equidigital number, since it uses as much as digits as its factorization.

200122202001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900765586278.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 200122202001221 its reverse (122100202221002), we get a palindrome (322222404222223).

The spelling of 200122202001221 in words is "two hundred trillion, one hundred twenty-two billion, two hundred two million, one thousand, two hundred twenty-one".