1103220100 has 36 divisors (see below), whose sum is σ = 2534814324. Its totient is φ = 415329280.

The previous prime is 1103220077. The next prime is 1103220103. The reversal of 1103220100 is 10223011.

It can be written as a sum of positive squares in 6 ways, for example, as 36675136 + 1066544964 = 6056^2 + 32658^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1103220103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322777 + ... + 326176.

It is an arithmetic number, because the mean of its divisors is an integer number (70411509).

Almost surely, 2^1103220100 is an apocalyptic number.

1103220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1103220100 is an abundant number, since it is smaller than the sum of its proper divisors (1431594224).

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

1103220100 is a wasteful number, since it uses less digits than its factorization.

1103220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648984 (or 648977 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1103220100 is about 33214.7572623977. The cubic root of 1103220100 is about 1033.2864205780.

Adding to 1103220100 its reverse (10223011), we get a palindrome (1113443111).

The spelling of 1103220100 in words is "one billion, one hundred three million, two hundred twenty thousand, one hundred".