221122202210 has 64 divisors (see below), whose sum is σ = 490894387200. Its totient is φ = 69835295232.

The previous prime is 221122202209. The next prime is 221122202221. The reversal of 221122202210 is 12202221122.

It is a happy number.

It is a super-4 number, since 4×221122202210⁴ (a number of 46 digits) contains 4444 as substring.

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, 182246 + ... + 689534.

It is an arithmetic number, because the mean of its divisors is an integer number (7670224800).

Almost surely, 2^221122202210 is an apocalyptic number.

221122202210 is an abundant number, since it is smaller than the sum of its proper divisors (269772184990).

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

221122202210 is a wasteful number, since it uses less digits than its factorization.

221122202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507795.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221122202210 its reverse (12202221122), we get a palindrome (233324423332).

The spelling of 221122202210 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred two thousand, two hundred ten".