221192121200 has 60 divisors (see below), whose sum is σ = 536116960128. Its totient is φ = 87693849600.

The previous prime is 221192121187. The next prime is 221192121209. The reversal of 221192121200 is 2121291122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221192121209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2401616 + ... + 2492015.

Almost surely, 2^221192121200 is an apocalyptic number.

221192121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221192121200 is an abundant number, since it is smaller than the sum of its proper divisors (314924838928).

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

221192121200 is a wasteful number, since it uses less digits than its factorization.

221192121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893762 (or 4893751 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 221192121200 in words is "two hundred twenty-one billion, one hundred ninety-two million, one hundred twenty-one thousand, two hundred".