12223021220 has 12 divisors (see below), whose sum is σ = 25668344604. Its totient is φ = 4889208480.

The previous prime is 12223021219. The next prime is 12223021241. The reversal of 12223021220 is 2212032221.

It can be written as a sum of positive squares in 2 ways, for example, as 8677295104 + 3545726116 = 93152^2 + 59546^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305575511 + ... + 305575550.

It is an arithmetic number, because the mean of its divisors is an integer number (2139028717).

Almost surely, 2^12223021220 is an apocalyptic number.

12223021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12223021220 is an abundant number, since it is smaller than the sum of its proper divisors (13445323384).

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

12223021220 is a wasteful number, since it uses less digits than its factorization.

12223021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611151070 (or 611151068 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 12223021220 its reverse (2212032221), we get a palindrome (14435053441).

The spelling of 12223021220 in words is "twelve billion, two hundred twenty-three million, twenty-one thousand, two hundred twenty".