200121002022001 has 6 divisors (see below), whose sum is σ = 212585285885270. Its totient is φ = 188349178373376.

The previous prime is 200121002021989. The next prime is 200121002022037. The reversal of 200121002022001 is 100220200121002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 86606382125025 + 113514619896976 = 9306255^2 + 10654324^2 .

It is not a de Polignac number, because 200121002022001 - 2¹³ = 200121002013809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200121002022101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 346230107016 + ... + 346230107593.

Almost surely, 2^{200121002022001} is an apocalyptic number.

It is an amenable number.

200121002022001 is a deficient number, since it is larger than the sum of its proper divisors (12464283863269).

200121002022001 is an equidigital number, since it uses as much as digits as its factorization.

200121002022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692460214643 (or 692460214626 counting only the distinct ones).

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

Adding to 200121002022001 its reverse (100220200121002), we get a palindrome (300341202143003).

The spelling of 200121002022001 in words is "two hundred trillion, one hundred twenty-one billion, two million, twenty-two thousand, one".