221200211221100 has 36 divisors (see below), whose sum is σ = 480005172109008. Its totient is φ = 88479952920000.

The previous prime is 221200211221063. The next prime is 221200211221103. The reversal of 221200211221100 is 1122112002122.

It is not an unprimeable number, because it can be changed into a prime (221200211221103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93092825 + ... + 95439375.

It is an arithmetic number, because the mean of its divisors is an integer number (13333477003028).

Almost surely, 2^{221200211221100} is an apocalyptic number.

221200211221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200211221100 is an abundant number, since it is smaller than the sum of its proper divisors (258804960887908).

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

221200211221100 is a wasteful number, since it uses less digits than its factorization.

221200211221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289226 (or 3289219 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221200211221100 its reverse (1122112002122), we get a palindrome (222322323223222).

The spelling of 221200211221100 in words is "two hundred twenty-one trillion, two hundred billion, two hundred eleven million, two hundred twenty-one thousand, one hundred".