221222101210000 has 100 divisors (see below), whose sum is σ = 584291814006384. Its totient is φ = 80444400400000.

The previous prime is 221222101209979. The next prime is 221222101210009. The reversal of 221222101210000 is 12101222122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (221222101210009) 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 19 ways as a sum of consecutive naturals, for example, 1005445006 + ... + 1005665005.

Almost surely, 2^{221222101210000} is an apocalyptic number.

221222101210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222101210000 is an abundant number, since it is smaller than the sum of its proper divisors (363069712796384).

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

221222101210000 is a wasteful number, since it uses less digits than its factorization.

221222101210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011110050 (or 2011110029 counting only the distinct ones).

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

Adding to 221222101210000 its reverse (12101222122), we get a palindrome (221234202432122).

The spelling of 221222101210000 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred one million, two hundred ten thousand".