221121022221200 has 60 divisors (see below), whose sum is σ = 531443049061680. Its totient is φ = 88415144676480.

The previous prime is 221121022221167. The next prime is 221121022221277. The reversal of 221121022221200 is 2122220121122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102885734 + ... + 105012933.

It is an arithmetic number, because the mean of its divisors is an integer number (8857384151028).

Almost surely, 2^{221121022221200} is an apocalyptic number.

221121022221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221121022221200 is an abundant number, since it is smaller than the sum of its proper divisors (310322026840480).

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

221121022221200 is a wasteful number, since it uses less digits than its factorization.

221121022221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207901344 (or 207901333 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221121022221200 its reverse (2122220121122), we get a palindrome (223243242342322).

The spelling of 221121022221200 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred".