201212111122211 has 16 divisors (see below), whose sum is σ = 235036265318400. Its totient is φ = 172183392629640.

The previous prime is 201212111122171. The next prime is 201212111122213. The reversal of 201212111122211 is 112221111212102.

It is a happy number.

It is not a de Polignac number, because 201212111122211 - 2⁶ = 201212111122147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201212111122213) 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, 483007805 + ... + 483424206.

It is an arithmetic number, because the mean of its divisors is an integer number (14689766582400).

Almost surely, 2^{201212111122211} is an apocalyptic number.

201212111122211 is a deficient number, since it is larger than the sum of its proper divisors (33824154196189).

201212111122211 is an frugal number, since it uses more digits than its factorization.

201212111122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966432639 (or 966432625 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 201212111122211 its reverse (112221111212102), we get a palindrome (313433222334313).

The spelling of 201212111122211 in words is "two hundred one trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, two hundred eleven".