221112121102220 has 12 divisors (see below), whose sum is σ = 464335454314704. Its totient is φ = 88444848440880.

The previous prime is 221112121102219. The next prime is 221112121102237. The reversal of 221112121102220 is 22201121211122.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11055606055111 = 221112121102220 / (2 + 2 + 1 + 1 + 1 + 2 + 1 + 2 + 1 + 1 + 0 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 221112121102192 and 221112121102201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5527803027536 + ... + 5527803027575.

It is an arithmetic number, because the mean of its divisors is an integer number (38694621192892).

Almost surely, 2^{221112121102220} is an apocalyptic number.

221112121102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112121102220 is an abundant number, since it is smaller than the sum of its proper divisors (243223333212484).

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

221112121102220 is a wasteful number, since it uses less digits than its factorization.

221112121102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11055606055120 (or 11055606055118 counting only the distinct ones).

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

Adding to 221112121102220 its reverse (22201121211122), we get a palindrome (243313242313342).

The spelling of 221112121102220 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty".