221111022120 has 32 divisors (see below), whose sum is σ = 663333066720. Its totient is φ = 58962939200.

The previous prime is 221111022101. The next prime is 221111022133. The reversal of 221111022120 is 21220111122.

It is a super-2 number, since 2×221111022120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221111022120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921295806 + ... + 921296045.

It is an arithmetic number, because the mean of its divisors is an integer number (20729158335).

Almost surely, 2^221111022120 is an apocalyptic number.

221111022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111022120 is an abundant number, since it is smaller than the sum of its proper divisors (442222044600).

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

221111022120 is a wasteful number, since it uses less digits than its factorization.

221111022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842591865 (or 1842591861 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221111022120 its reverse (21220111122), we get a palindrome (242331133242).

The spelling of 221111022120 in words is "two hundred twenty-one billion, one hundred eleven million, twenty-two thousand, one hundred twenty".