221332121200 has 30 divisors (see below), whose sum is σ = 531750422144. Its totient is φ = 88532848320.

The previous prime is 221332121167. The next prime is 221332121267. The reversal of 221332121200 is 2121233122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276664752 + ... + 276665551.

Almost surely, 2^221332121200 is an apocalyptic number.

221332121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221332121200 is an abundant number, since it is smaller than the sum of its proper divisors (310418300944).

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

221332121200 is a wasteful number, since it uses less digits than its factorization.

221332121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553330321 (or 553330310 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221332121200 its reverse (2121233122), we get a palindrome (223453354322).

The spelling of 221332121200 in words is "two hundred twenty-one billion, three hundred thirty-two million, one hundred twenty-one thousand, two hundred".