221221033000 has 96 divisors (see below), whose sum is σ = 568995434280. Its totient is φ = 80443968000.

The previous prime is 221221032961. The next prime is 221221033049. The reversal of 221221033000 is 330122122.

It can be written as a sum of positive squares in 4 ways, for example, as 96401556196 + 124819476804 = 310486^2 + 353298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 793137 + ... + 1035136.

Almost surely, 2^221221033000 is an apocalyptic number.

221221033000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221221033000 is an abundant number, since it is smaller than the sum of its proper divisors (347774401280).

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

221221033000 is a wasteful number, since it uses less digits than its factorization.

221221033000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828316 (or 1828291 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 221221033000 its reverse (330122122), we get a palindrome (221551155122).

The spelling of 221221033000 in words is "two hundred twenty-one billion, two hundred twenty-one million, thirty-three thousand".