221200222210212 has 72 divisors (see below), whose sum is σ = 600468543554880. Its totient is φ = 63192911866560.

The previous prime is 221200222210169. The next prime is 221200222210229. The reversal of 221200222210212 is 212012222002122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16082839 + ... + 26477502.

Almost surely, 2^{221200222210212} is an apocalyptic number.

It is an amenable number.

221200222210212 is an abundant number, since it is smaller than the sum of its proper divisors (379268321344668).

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

221200222210212 is a wasteful number, since it uses less digits than its factorization.

221200222210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42569201 (or 42569192 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221200222210212 its reverse (212012222002122), we get a palindrome (433212444212334).

The spelling of 221200222210212 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty-two million, two hundred ten thousand, two hundred twelve".