201121220200212 has 144 divisors (see below), whose sum is σ = 548390821305600. Its totient is φ = 61782400076544.

The previous prime is 201121220200207. The next prime is 201121220200223. The reversal of 201121220200212 is 212002022121102.

It is a happy number.

201121220200212 is a `hidden beast` number, since 2 + 0 + 11 + 21 + 220 + 200 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6947417914 + ... + 6947446862.

It is an arithmetic number, because the mean of its divisors is an integer number (3808269592400).

Almost surely, 2^{201121220200212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201121220200212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274195410652800).

201121220200212 is an abundant number, since it is smaller than the sum of its proper divisors (347269601105388).

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

201121220200212 is a wasteful number, since it uses less digits than its factorization.

201121220200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52702 (or 52697 counting only the distinct ones).

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

Adding to 201121220200212 its reverse (212002022121102), we get a palindrome (413123242321314).

The spelling of 201121220200212 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred twenty million, two hundred thousand, two hundred twelve".