201021211212211 has 16 divisors (see below), whose sum is σ = 216546304958368. Its totient is φ = 185504967244800.

The previous prime is 201021211212181. The next prime is 201021211212233. The reversal of 201021211212211 is 112212112120102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201021211212211 - 2⁹ = 201021211211699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021211212911) 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, 1861753456 + ... + 1861861426.

It is an arithmetic number, because the mean of its divisors is an integer number (13534144059898).

Almost surely, 2^{201021211212211} is an apocalyptic number.

201021211212211 is a deficient number, since it is larger than the sum of its proper divisors (15525093746157).

201021211212211 is a wasteful number, since it uses less digits than its factorization.

201021211212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147622.

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

Adding to 201021211212211 its reverse (112212112120102), we get a palindrome (313233323332313).

The spelling of 201021211212211 in words is "two hundred one trillion, twenty-one billion, two hundred eleven million, two hundred twelve thousand, two hundred eleven".