12220111020 has 192 divisors, whose sum is σ = 39098820096. Its totient is φ = 2825072640.

The previous prime is 12220111019. The next prime is 12220111021. The reversal of 12220111020 is 2011102221.

It is an interprime number because it is at equal distance from previous prime (12220111019) and next prime (12220111021).

It is a super-2 number, since 2×12220111020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12220110987 and 12220111005.

It is not an unprimeable number, because it can be changed into a prime (12220111021) 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 63 ways as a sum of consecutive naturals, for example, 10435035 + ... + 10436205.

It is an arithmetic number, because the mean of its divisors is an integer number (203639688).

Almost surely, 2^12220111020 is an apocalyptic number.

12220111020 is a gapful number since it is divisible by the number (10) 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 12220111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19549410048).

12220111020 is an abundant number, since it is smaller than the sum of its proper divisors (26878709076).

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

12220111020 is a wasteful number, since it uses less digits than its factorization.

12220111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000 (or 1998 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12220111020 its reverse (2011102221), we get a palindrome (14231213241).

The spelling of 12220111020 in words is "twelve billion, two hundred twenty million, one hundred eleven thousand, twenty".