201222121212 has 48 divisors (see below), whose sum is σ = 596213694720. Its totient is φ = 57492034416.

The previous prime is 201222121189. The next prime is 201222121213. The reversal of 201222121212 is 212121222102.

It is a happy number.

201222121212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222121213) 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, 133082658 + ... + 133084169.

It is an arithmetic number, because the mean of its divisors is an integer number (12421118640).

Almost surely, 2^201222121212 is an apocalyptic number.

It is an amenable number.

201222121212 is an abundant number, since it is smaller than the sum of its proper divisors (394991573508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201222121212 is a wasteful number, since it uses less digits than its factorization.

201222121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266166847 (or 266166839 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201222121212 its reverse (212121222102), we get a palindrome (413343343314).

The spelling of 201222121212 in words is "two hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".