201212121101212 has 48 divisors (see below), whose sum is σ = 384434183637952. Its totient is φ = 91587331100160.

The previous prime is 201212121101209. The next prime is 201212121101219. The reversal of 201212121101212 is 212101121212102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201212121101212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212121101219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43371262 + ... + 47785882.

Almost surely, 2^{201212121101212} is an apocalyptic number.

It is an amenable number.

201212121101212 is a deficient number, since it is larger than the sum of its proper divisors (183222062536740).

201212121101212 is a wasteful number, since it uses less digits than its factorization.

201212121101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426718 (or 4426716 counting only the distinct ones).

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

Adding to 201212121101212 its reverse (212101121212102), we get a palindrome (413313242313314).

The spelling of 201212121101212 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred one thousand, two hundred twelve".