1102221220 has 24 divisors (see below), whose sum is σ = 2327460408. Its totient is φ = 438451200.

The previous prime is 1102221199. The next prime is 1102221247. The reversal of 1102221220 is 221222011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17572864 + 1084648356 = 4192^2 + 32934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1102221220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148621 + ... + 155860.

It is an arithmetic number, because the mean of its divisors is an integer number (96977517).

Almost surely, 2^1102221220 is an apocalyptic number.

1102221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1102221220 is an abundant number, since it is smaller than the sum of its proper divisors (1225239188).

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

1102221220 is a wasteful number, since it uses less digits than its factorization.

1102221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304671 (or 304669 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1102221220 is about 33199.7171674700. The cubic root of 1102221220 is about 1032.9744729136.

Adding to 1102221220 its reverse (221222011), we get a palindrome (1323443231).

The spelling of 1102221220 in words is "one billion, one hundred two million, two hundred twenty-one thousand, two hundred twenty".