221002101021200 has 30 divisors (see below), whose sum is σ = 530957547704394. Its totient is φ = 88400840408320.

The previous prime is 221002101021157. The next prime is 221002101021217. The reversal of 221002101021200 is 2120101200122.

It can be written as a sum of positive squares in 3 ways, for example, as 3815740305664 + 217186360715536 = 1953392^2 + 14737244^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276252625877 + ... + 276252626676.

Almost surely, 2^{221002101021200} is an apocalyptic number.

221002101021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002101021200 is an abundant number, since it is smaller than the sum of its proper divisors (309955446683194).

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

221002101021200 is a wasteful number, since it uses less digits than its factorization.

221002101021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552505252571 (or 552505252560 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221002101021200 its reverse (2120101200122), we get a palindrome (223122202221322).

The spelling of 221002101021200 in words is "two hundred twenty-one trillion, two billion, one hundred one million, twenty-one thousand, two hundred".