111120002100 has 108 divisors (see below), whose sum is σ = 357713079724. Its totient is φ = 28831127040.

The previous prime is 111120002099. The next prime is 111120002101. The reversal of 111120002100 is 1200021111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111120002099) and next prime (111120002101).

It can be written as a sum of positive squares in 6 ways, for example, as 1867276944 + 109252725156 = 43212^2 + 330534^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120002101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1635169 + ... + 1701768.

Almost surely, 2^111120002100 is an apocalyptic number.

111120002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111120002100 is an abundant number, since it is smaller than the sum of its proper divisors (246593077624).

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

111120002100 is a wasteful number, since it uses less digits than its factorization.

111120002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336994 (or 3336984 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111120002100 its reverse (1200021111), we get a palindrome (112320023211).

The spelling of 111120002100 in words is "one hundred eleven billion, one hundred twenty million, two thousand, one hundred".