201212121220112 has 20 divisors (see below), whose sum is σ = 389879780785596. Its totient is φ = 100597984243200.

The previous prime is 201212121220093. The next prime is 201212121220153. The reversal of 201212121220112 is 211022121212102.

It can be written as a sum of positive squares in 2 ways, for example, as 151477411603456 + 49734709616656 = 12307616^2 + 7052284^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504567389 + ... + 504966012.

Almost surely, 2^{201212121220112} is an apocalyptic number.

It is an amenable number.

201212121220112 is a deficient number, since it is larger than the sum of its proper divisors (188667659565484).

201212121220112 is a wasteful number, since it uses less digits than its factorization.

201212121220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009545866 (or 1009545860 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201212121220112 its reverse (211022121212102), we get a palindrome (412234242432214).

The spelling of 201212121220112 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twelve".