201000222020221 has 16 divisors (see below), whose sum is σ = 218680115436720. Its totient is φ = 183638497075200.

The previous prime is 201000222020203. The next prime is 201000222020267. The reversal of 201000222020221 is 122020222000102.

It can be written as a sum of positive squares in 8 ways, for example, as 395886348025 + 200604335672196 = 629195^2 + 14163486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201000222020221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201000222020195 and 201000222020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000222020321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22492740 + ... + 30131773.

It is an arithmetic number, because the mean of its divisors is an integer number (13667507214795).

Almost surely, 2^{201000222020221} is an apocalyptic number.

It is an amenable number.

201000222020221 is a deficient number, since it is larger than the sum of its proper divisors (17679893416499).

201000222020221 is a wasteful number, since it uses less digits than its factorization.

201000222020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52627536.

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

Adding to 201000222020221 its reverse (122020222000102), we get a palindrome (323020444020323).

The spelling of 201000222020221 in words is "two hundred one trillion, two hundred twenty-two million, twenty thousand, two hundred twenty-one".