1123012100 has 72 divisors (see below), whose sum is σ = 2931687360. Its totient is φ = 364763520.

The previous prime is 1123012091. The next prime is 1123012103. The reversal of 1123012100 is 12103211.

It is a super-2 number, since 2×1123012100² = 2522312353492820000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123012103) 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, 28919 + ... + 55518.

It is an arithmetic number, because the mean of its divisors is an integer number (40717880).

Almost surely, 2^1123012100 is an apocalyptic number.

1123012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123012100 is an abundant number, since it is smaller than the sum of its proper divisors (1808675260).

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

1123012100 is a wasteful number, since it uses less digits than its factorization.

1123012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84477 (or 84470 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1123012100 is about 33511.3726964444. The cubic root of 1123012100 is about 1039.4289579600.

Adding to 1123012100 its reverse (12103211), we get a palindrome (1135115311).

The spelling of 1123012100 in words is "one billion, one hundred twenty-three million, twelve thousand, one hundred".