221112120011220 has 144 divisors (see below), whose sum is σ = 692357249945088. Its totient is φ = 57059973815040.

The previous prime is 221112120011161. The next prime is 221112120011269. The reversal of 221112120011220 is 22110021211122.

221112120011220 is a `hidden beast` number, since 2 + 211 + 1 + 21 + 200 + 11 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221112120011193 and 221112120011202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277245867 + ... + 278042253.

It is an arithmetic number, because the mean of its divisors is an integer number (4808036457952).

Almost surely, 2^{221112120011220} is an apocalyptic number.

221112120011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112120011220 is an abundant number, since it is smaller than the sum of its proper divisors (471245129933868).

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

221112120011220 is a wasteful number, since it uses less digits than its factorization.

221112120011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846190 (or 846185 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221112120011220 its reverse (22110021211122), we get a palindrome (243222141222342).

The spelling of 221112120011220 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred twenty million, eleven thousand, two hundred twenty".