201212122111 has 192 divisors, whose sum is σ = 301001412096. Its totient is φ = 131681894400.

The previous prime is 201212122081. The next prime is 201212122141. The reversal of 201212122111 is 111221212102.

It is an interprime number because it is at equal distance from previous prime (201212122081) and next prime (201212122141).

It is not a de Polignac number, because 201212122111 - 2¹⁷ = 201211991039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212122141) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 834904951 + ... + 834905191.

It is an arithmetic number, because the mean of its divisors is an integer number (1567715688).

Almost surely, 2^201212122111 is an apocalyptic number.

201212122111 is a deficient number, since it is larger than the sum of its proper divisors (99789289985).

201212122111 is a wasteful number, since it uses less digits than its factorization.

201212122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201212122111 its reverse (111221212102), we get a palindrome (312433334213).

It can be divided in two parts, 201212 and 122111, that added together give a palindrome (323323).

The spelling of 201212122111 in words is "two hundred one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred eleven".