201021212102111 has 16 divisors (see below), whose sum is σ = 201621874156800. Its totient is φ = 200421480264768.

The previous prime is 201021212102099. The next prime is 201021212102197. The reversal of 201021212102111 is 111201212120102.

It is a cyclic number.

It is not a de Polignac number, because 201021212102111 - 2⁴² = 196623165591007 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 201021212102111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021212102311) 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, 4427464736 + ... + 4427510138.

It is an arithmetic number, because the mean of its divisors is an integer number (12601367134800).

Almost surely, 2^{201021212102111} is an apocalyptic number.

201021212102111 is a deficient number, since it is larger than the sum of its proper divisors (600662054689).

201021212102111 is an equidigital number, since it uses as much as digits as its factorization.

201021212102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55358.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201021212102111 its reverse (111201212120102), we get a palindrome (312222424222213).

The spelling of 201021212102111 in words is "two hundred one trillion, twenty-one billion, two hundred twelve million, one hundred two thousand, one hundred eleven".