200001021221001 has 128 divisors (see below), whose sum is σ = 371361464635392. Its totient is φ = 92388677760000.

The previous prime is 200001021220901. The next prime is 200001021221033. The reversal of 200001021221001 is 100122120100002.

It is not a de Polignac number, because 200001021221001 - 2⁴³ = 191204928198793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200001021221501) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2311266 + ... + 20133156.

It is an arithmetic number, because the mean of its divisors is an integer number (2901261442464).

Almost surely, 2^{200001021221001} is an apocalyptic number.

200001021221001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200001021221001 is a deficient number, since it is larger than the sum of its proper divisors (171360443414391).

200001021221001 is a wasteful number, since it uses less digits than its factorization.

200001021221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17822063.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 200001021221001 its reverse (100122120100002), we get a palindrome (300123141321003).

The spelling of 200001021221001 in words is "two hundred trillion, one billion, twenty-one million, two hundred twenty-one thousand, one".