111000021200 has 30 divisors (see below), whose sum is σ = 266677551894. Its totient is φ = 44400008320.

The previous prime is 111000021131. The next prime is 111000021203. The reversal of 111000021200 is 2120000111.

It can be written as a sum of positive squares in 3 ways, for example, as 29217748624 + 81782272576 = 170932^2 + 285976^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000021203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138749627 + ... + 138750426.

Almost surely, 2^111000021200 is an apocalyptic number.

111000021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111000021200 is an abundant number, since it is smaller than the sum of its proper divisors (155677530694).

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

111000021200 is a wasteful number, since it uses less digits than its factorization.

111000021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277500071 (or 277500060 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 111000021200 its reverse (2120000111), we get a palindrome (113120021311).

The spelling of 111000021200 in words is "one hundred eleven billion, twenty-one thousand, two hundred".