221221120232200 has 96 divisors (see below), whose sum is σ = 561119523016320. Its totient is φ = 80440844000000.

The previous prime is 221221120232081. The next prime is 221221120232207. The reversal of 221221120232200 is 2232021122122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (221221120232207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53675025 + ... + 57649375.

It is an arithmetic number, because the mean of its divisors is an integer number (5844995031420).

Almost surely, 2^{221221120232200} is an apocalyptic number.

221221120232200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221221120232200 is an abundant number, since it is smaller than the sum of its proper divisors (339898402784120).

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

221221120232200 is a wasteful number, since it uses less digits than its factorization.

221221120232200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999679 (or 3999670 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221221120232200 its reverse (2232021122122), we get a palindrome (223453141354322).

The spelling of 221221120232200 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred thirty-two thousand, two hundred".