2201221122210 has 160 divisors (see below), whose sum is σ = 6461981520192. Its totient is φ = 533210670720.

The previous prime is 2201221122179. The next prime is 2201221122229. The reversal of 2201221122210 is 122211221022.

It is a happy number.

2201221122210 is a `hidden beast` number, since 220 + 1 + 2 + 211 + 22 + 210 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11335252 + ... + 11527808.

Almost surely, 2^{2201221122210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2201221122210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3230990760096).

2201221122210 is an abundant number, since it is smaller than the sum of its proper divisors (4260760397982).

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

2201221122210 is a wasteful number, since it uses less digits than its factorization.

2201221122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193870 (or 193861 counting only the distinct ones).

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

Adding to 2201221122210 its reverse (122211221022), we get a palindrome (2323432343232).

The spelling of 2201221122210 in words is "two trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred ten".