222011220 has 24 divisors (see below), whose sum is σ = 621631584. Its totient is φ = 59202976.

The previous prime is 222011201. The next prime is 222011261. The reversal of 222011220 is 22110222.

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 = 222011196 and 222011205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850034 + ... + 1850153.

It is an arithmetic number, because the mean of its divisors is an integer number (25901316).

Almost surely, 2^222011220 is an apocalyptic number.

222011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222011220 is an abundant number, since it is smaller than the sum of its proper divisors (399620364).

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

222011220 is a wasteful number, since it uses less digits than its factorization.

222011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700199 (or 3700197 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 222011220 is about 14900.0409395411. The cubic root of 222011220 is about 605.5150953275.

Adding to 222011220 its reverse (22110222), we get a palindrome (244121442).

The spelling of 222011220 in words is "two hundred twenty-two million, eleven thousand, two hundred twenty".