221200121212210 has 32 divisors (see below), whose sum is σ = 455044776860160. Its totient is φ = 75839286973632.

The previous prime is 221200121212163. The next prime is 221200121212211. The reversal of 221200121212210 is 12212121002122.

It is not an unprimeable number, because it can be changed into a prime (221200121212211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8612074 + ... + 22728133.

It is an arithmetic number, because the mean of its divisors is an integer number (14220149276880).

Almost surely, 2^{221200121212210} is an apocalyptic number.

221200121212210 is an abundant number, since it is smaller than the sum of its proper divisors (233844655647950).

221200121212210 is a wasteful number, since it uses less digits than its factorization.

221200121212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31441050.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221200121212210 its reverse (12212121002122), we get a palindrome (233412242214332).

The spelling of 221200121212210 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, two hundred twelve thousand, two hundred ten".