221111011102120 has 16 divisors (see below), whose sum is σ = 497499774979860. Its totient is φ = 88444404440832.

The previous prime is 221111011102063. The next prime is 221111011102141. The reversal of 221111011102120 is 21201110111122.

It can be written as a sum of positive squares in 2 ways, for example, as 215032133472676 + 6078877629444 = 14663974^2 + 2465538^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221111011102094 and 221111011102103.

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, 2763887638737 + ... + 2763887638816.

Almost surely, 2^{221111011102120} is an apocalyptic number.

221111011102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111011102120 is an abundant number, since it is smaller than the sum of its proper divisors (276388763877740).

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

221111011102120 is a wasteful number, since it uses less digits than its factorization.

221111011102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527775277564 (or 5527775277560 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 221111011102120 its reverse (21201110111122), we get a palindrome (242312121213242).

The spelling of 221111011102120 in words is "two hundred twenty-one trillion, one hundred eleven billion, eleven million, one hundred two thousand, one hundred twenty".