220111001020 has 12 divisors (see below), whose sum is σ = 462233102184. Its totient is φ = 88044400400.

The previous prime is 220111001017. The next prime is 220111001021. The reversal of 220111001020 is 20100111022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 220111000988 and 220111001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111001021) by changing a digit.

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, 5502775006 + ... + 5502775045.

It is an arithmetic number, because the mean of its divisors is an integer number (38519425182).

Almost surely, 2^220111001020 is an apocalyptic number.

220111001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220111001020 is an abundant number, since it is smaller than the sum of its proper divisors (242122101164).

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

220111001020 is a wasteful number, since it uses less digits than its factorization.

220111001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11005550060 (or 11005550058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 220111001020 its reverse (20100111022), we get a palindrome (240211112042).

The spelling of 220111001020 in words is "two hundred twenty billion, one hundred eleven million, one thousand, twenty".