1123013100 has 108 divisors (see below), whose sum is σ = 3571606472. Its totient is φ = 272236800.

The previous prime is 1123013053. The next prime is 1123013119. The reversal of 1123013100 is 13103211.

It is a super-2 number, since 2×1123013100² = 2522316845543220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20832 + ... + 51768.

Almost surely, 2^1123013100 is an apocalyptic number.

1123013100 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 1123013100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785803236).

1123013100 is an abundant number, since it is smaller than the sum of its proper divisors (2448593372).

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

1123013100 is a wasteful number, since it uses less digits than its factorization.

1123013100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30976 (or 30958 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1123013100 is about 33511.3876167490. The cubic root of 1123013100 is about 1039.4292664840.

Adding to 1123013100 its reverse (13103211), we get a palindrome (1136116311).

The spelling of 1123013100 in words is "one billion, one hundred twenty-three million, thirteen thousand, one hundred".