221122121120000 has 90 divisors (see below), whose sum is σ = 551549053148478. Its totient is φ = 88448848384000.

The previous prime is 221122121119997. The next prime is 221122121120099. The reversal of 221122121120000 is 21121221122.

It can be written as a sum of positive squares in 5 ways, for example, as 25882534150144 + 195239586969856 = 5087488^2 + 13972816^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 690846629 + ... + 691166628.

Almost surely, 2^{221122121120000} is an apocalyptic number.

221122121120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122121120000 is an abundant number, since it is smaller than the sum of its proper divisors (330426932028478).

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

221122121120000 is an frugal number, since it uses more digits than its factorization.

221122121120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382013293 (or 1382013264 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221122121120000 its reverse (21121221122), we get a palindrome (221143242341122).

The spelling of 221122121120000 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand".