1113120100 has 72 divisors (see below), whose sum is σ = 2513339136. Its totient is φ = 427440000.

The previous prime is 1113120053. The next prime is 1113120103. The reversal of 1113120100 is 10213111.

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 (1113120103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404730 + ... + 407470.

It is an arithmetic number, because the mean of its divisors is an integer number (34907488).

Almost surely, 2^1113120100 is an apocalyptic number.

1113120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1113120100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256669568).

1113120100 is an abundant number, since it is smaller than the sum of its proper divisors (1400219036).

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

1113120100 is a wasteful number, since it uses less digits than its factorization.

1113120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2910 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1113120100 is about 33363.4545573446. The cubic root of 1113120100 is about 1036.3680323596.

Adding to 1113120100 its reverse (10213111), we get a palindrome (1123333211).

The spelling of 1113120100 in words is "one billion, one hundred thirteen million, one hundred twenty thousand, one hundred".