2221122120210 has 64 divisors (see below), whose sum is σ = 6769134086400. Its totient is φ = 507685055616.

The previous prime is 2221122120163. The next prime is 2221122120227. The reversal of 2221122120210 is 120212211222.

It is a happy number.

2221122120210 is a `hidden beast` number, since 2 + 2 + 211 + 221 + 20 + 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 31 ways as a sum of consecutive naturals, for example, 587596555 + ... + 587600334.

It is an arithmetic number, because the mean of its divisors is an integer number (105767720100).

Almost surely, 2^{2221122120210} is an apocalyptic number.

2221122120210 is an abundant number, since it is smaller than the sum of its proper divisors (4548011966190).

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

2221122120210 is a wasteful number, since it uses less digits than its factorization.

2221122120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175196912 (or 1175196906 counting only the distinct ones).

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

Adding to 2221122120210 its reverse (120212211222), we get a palindrome (2341334331432).

The spelling of 2221122120210 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, two hundred ten".