1101332220 has 24 divisors (see below), whose sum is σ = 3083730384. Its totient is φ = 293688576.

The previous prime is 1101332147. The next prime is 1101332237. The reversal of 1101332220 is 222331011.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1101332220.

It is a congruent number.

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, 9177709 + ... + 9177828.

It is an arithmetic number, because the mean of its divisors is an integer number (128488766).

Almost surely, 2^1101332220 is an apocalyptic number.

1101332220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101332220 is an abundant number, since it is smaller than the sum of its proper divisors (1982398164).

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

1101332220 is a wasteful number, since it uses less digits than its factorization.

1101332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18355549 (or 18355547 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1101332220 is about 33186.3257984369. The cubic root of 1101332220 is about 1032.6966819432.

Adding to 1101332220 its reverse (222331011), we get a palindrome (1323663231).

The spelling of 1101332220 in words is "one billion, one hundred one million, three hundred thirty-two thousand, two hundred twenty".