111213100 has 18 divisors (see below), whose sum is σ = 241332644. Its totient is φ = 44485200.

The previous prime is 111213079. The next prime is 111213101. The reversal of 111213100 is 1312111.

It is a super-2 number, since 2×111213100² = 24736707223220000, which contains 22 as substring.

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 (111213101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555966 + ... + 556165.

Almost surely, 2^111213100 is an apocalyptic number.

111213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111213100 is an abundant number, since it is smaller than the sum of its proper divisors (130119544).

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

111213100 is a wasteful number, since it uses less digits than its factorization.

111213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112145 (or 1112138 counting only the distinct ones).

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

The square root of 111213100 is about 10545.7621820331. The cubic root of 111213100 is about 480.8969052176.

Adding to 111213100 its reverse (1312111), we get a palindrome (112525211).

The spelling of 111213100 in words is "one hundred eleven million, two hundred thirteen thousand, one hundred".