201221120112210 has 160 divisors (see below), whose sum is σ = 590258943578304. Its totient is φ = 48780024336000.

The previous prime is 201221120112167. The next prime is 201221120112217. The reversal of 201221120112210 is 12211021122102.

201221120112210 is a `hidden beast` number, since 2 + 0 + 1 + 221 + 120 + 112 + 210 = 666.

201221120112210 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 Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201221120112217) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 617665465 + ... + 617991155.

Almost surely, 2^{201221120112210} is an apocalyptic number.

201221120112210 is an abundant number, since it is smaller than the sum of its proper divisors (389037823466094).

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

201221120112210 is a wasteful number, since it uses less digits than its factorization.

201221120112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395062 (or 395053 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201221120112210 its reverse (12211021122102), we get a palindrome (213432141234312).

The spelling of 201221120112210 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twelve thousand, two hundred ten".