221002100121200 has 60 divisors (see below), whose sum is σ = 530964597683040. Its totient is φ = 88399665914880.

The previous prime is 221002100121151. The next prime is 221002100121203. The reversal of 221002100121200 is 2121001200122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002100121203) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 26800472 + ... + 34062728.

It is an arithmetic number, because the mean of its divisors is an integer number (8849409961384).

Almost surely, 2^{221002100121200} is an apocalyptic number.

221002100121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002100121200 is an abundant number, since it is smaller than the sum of its proper divisors (309962497561840).

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

221002100121200 is a wasteful number, since it uses less digits than its factorization.

221002100121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338354 (or 7338343 counting only the distinct ones).

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

Adding to 221002100121200 its reverse (2121001200122), we get a palindrome (223123101321322).

The spelling of 221002100121200 in words is "two hundred twenty-one trillion, two billion, one hundred million, one hundred twenty-one thousand, two hundred".