1112112100 has 144 divisors (see below), whose sum is σ = 2778572160. Its totient is φ = 382412800.

The previous prime is 1112112041. The next prime is 1112112101. The reversal of 1112112100 is 12112111.

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 (1112112101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2858706 + ... + 2859094.

It is an arithmetic number, because the mean of its divisors is an integer number (19295640).

Almost surely, 2^1112112100 is an apocalyptic number.

1112112100 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 1112112100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389286080).

1112112100 is an abundant number, since it is smaller than the sum of its proper divisors (1666460060).

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

1112112100 is a wasteful number, since it uses less digits than its factorization.

1112112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1112112100 is about 33348.3447865108. The cubic root of 1112112100 is about 1036.0551058179.

Adding to 1112112100 its reverse (12112111), we get a palindrome (1124224211).

It can be divided in two parts, 111211 and 2100, that added together give a palindrome (113311).

The spelling of 1112112100 in words is "one billion, one hundred twelve million, one hundred twelve thousand, one hundred".