220111020 has 120 divisors (see below), whose sum is σ = 699242544. Its totient is φ = 57953664.

The previous prime is 220110967. The next prime is 220111027. The reversal of 220111020 is 20111022.

It is a super-2 number, since 2×220111020² = 96897722250880800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 220110993 and 220111011.

It is not an unprimeable number, because it can be changed into a prime (220111027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 133642 + ... + 135278.

Almost surely, 2^220111020 is an apocalyptic number.

220111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349621272).

220111020 is an abundant number, since it is smaller than the sum of its proper divisors (479131524).

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

220111020 is a wasteful number, since it uses less digits than its factorization.

220111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 220111020 is about 14836.1389855986. The cubic root of 220111020 is about 603.7826030771.

Adding to 220111020 its reverse (20111022), we get a palindrome (240222042).

The spelling of 220111020 in words is "two hundred twenty million, one hundred eleven thousand, twenty".