201021212211211 has 16 divisors (see below), whose sum is σ = 229797576373248. Its totient is φ = 172259615556000.

The previous prime is 201021212211179. The next prime is 201021212211271. The reversal of 201021212211211 is 112112212120102.

It is a happy number.

It is not a de Polignac number, because 201021212211211 - 2⁵ = 201021212211179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021212211271) 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, 457154946 + ... + 457594456.

It is an arithmetic number, because the mean of its divisors is an integer number (14362348523328).

Almost surely, 2^{201021212211211} is an apocalyptic number.

201021212211211 is a deficient number, since it is larger than the sum of its proper divisors (28776364162037).

201021212211211 is a wasteful number, since it uses less digits than its factorization.

201021212211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456162.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201021212211211 its reverse (112112212120102), we get a palindrome (313133424331313).

The spelling of 201021212211211 in words is "two hundred one trillion, twenty-one billion, two hundred twelve million, two hundred eleven thousand, two hundred eleven".