221112211202220 has 48 divisors (see below), whose sum is σ = 666738359935200. Its totient is φ = 54427621218816.

The previous prime is 221112211202191. The next prime is 221112211202243. The reversal of 221112211202220 is 22202112211122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141738596145 + ... + 141738597704.

It is an arithmetic number, because the mean of its divisors is an integer number (13890382498650).

Almost surely, 2^{221112211202220} is an apocalyptic number.

221112211202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112211202220 is an abundant number, since it is smaller than the sum of its proper divisors (445626148732980).

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

221112211202220 is a wasteful number, since it uses less digits than its factorization.

221112211202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283477193874 (or 283477193872 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221112211202220 its reverse (22202112211122), we get a palindrome (243314323413342).

The spelling of 221112211202220 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred eleven million, two hundred two thousand, two hundred twenty".