201212122212111 has 32 divisors (see below), whose sum is σ = 282155493703680. Its totient is φ = 127297118640384.

The previous prime is 201212122212109. The next prime is 201212122212131. The reversal of 201212122212111 is 111212221212102.

It is not a de Polignac number, because 201212122212111 - 2¹ = 201212122212109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212122212131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 991633555 + ... + 991836443.

It is an arithmetic number, because the mean of its divisors is an integer number (8817359178240).

Almost surely, 2^{201212122212111} is an apocalyptic number.

201212122212111 is a deficient number, since it is larger than the sum of its proper divisors (80943371491569).

201212122212111 is a wasteful number, since it uses less digits than its factorization.

201212122212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316215.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 201212122212111 its reverse (111212221212102), we get a palindrome (312424343424213).

The spelling of 201212122212111 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eleven".