221001021200212 has 96 divisors (see below), whose sum is σ = 445346129088000. Its totient is φ = 94904667411840.

The previous prime is 221001021200161. The next prime is 221001021200213. The reversal of 221001021200212 is 212002120100122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001021200213) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 931286518 + ... + 931523794.

It is an arithmetic number, because the mean of its divisors is an integer number (4639022178000).

Almost surely, 2^{221001021200212} is an apocalyptic number.

221001021200212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221001021200212 is an abundant number, since it is smaller than the sum of its proper divisors (224345107887788).

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

221001021200212 is a wasteful number, since it uses less digits than its factorization.

221001021200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240389 (or 240387 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221001021200212 its reverse (212002120100122), we get a palindrome (433003141300334).

The spelling of 221001021200212 in words is "two hundred twenty-one trillion, one billion, twenty-one million, two hundred thousand, two hundred twelve".