221112210212120 has 16 divisors (see below), whose sum is σ = 497502472977360. Its totient is φ = 88444884084832.

The previous prime is 221112210212107. The next prime is 221112210212183. The reversal of 221112210212120 is 21212012211122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221112210212092 and 221112210212101.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2763902627612 + ... + 2763902627691.

It is an arithmetic number, because the mean of its divisors is an integer number (31093904561085).

Almost surely, 2^{221112210212120} is an apocalyptic number.

221112210212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112210212120 is an abundant number, since it is smaller than the sum of its proper divisors (276390262765240).

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

221112210212120 is a wasteful number, since it uses less digits than its factorization.

221112210212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527805255314 (or 5527805255310 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221112210212120 its reverse (21212012211122), we get a palindrome (242324222423242).

The spelling of 221112210212120 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred twelve thousand, one hundred twenty".