221221011102112 has 72 divisors (see below), whose sum is σ = 506680689856320. Its totient is φ = 94800570480000.

The previous prime is 221221011102109. The next prime is 221221011102199. The reversal of 221221011102112 is 211201110122122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221221011102112.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11371689 + ... + 23911447.

It is an arithmetic number, because the mean of its divisors is an integer number (7037231803560).

Almost surely, 2^{221221011102112} is an apocalyptic number.

It is an amenable number.

221221011102112 is an abundant number, since it is smaller than the sum of its proper divisors (285459678754208).

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

221221011102112 is a wasteful number, since it uses less digits than its factorization.

221221011102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12551034 (or 12551019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221221011102112 its reverse (211201110122122), we get a palindrome (432422121224234).

The spelling of 221221011102112 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, eleven million, one hundred two thousand, one hundred twelve".