1102011220 has 12 divisors (see below), whose sum is σ = 2314223604. Its totient is φ = 440804480.

The previous prime is 1102011203. The next prime is 1102011221. The reversal of 1102011220 is 221102011.

It can be written as a sum of positive squares in 2 ways, for example, as 839376784 + 262634436 = 28972^2 + 16206^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1102011197 and 1102011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102011221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27550261 + ... + 27550300.

It is an arithmetic number, because the mean of its divisors is an integer number (192851967).

Almost surely, 2^1102011220 is an apocalyptic number.

1102011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1102011220 is an abundant number, since it is smaller than the sum of its proper divisors (1212212384).

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

1102011220 is a wasteful number, since it uses less digits than its factorization.

1102011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55100570 (or 55100568 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1102011220 is about 33196.5543392684. The cubic root of 1102011220 is about 1032.9088664777.

Adding to 1102011220 its reverse (221102011), we get a palindrome (1323113231).

The spelling of 1102011220 in words is "one billion, one hundred two million, eleven thousand, two hundred twenty".