111021020200 has 48 divisors (see below), whose sum is σ = 260784988380. Its totient is φ = 43950581760.

The previous prime is 111021020197. The next prime is 111021020221. The reversal of 111021020200 is 2020120111.

It can be written as a sum of positive squares in 6 ways, for example, as 72885960676 + 38135059524 = 269974^2 + 195282^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2841967 + ... + 2880766.

Almost surely, 2^111021020200 is an apocalyptic number.

111021020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021020200 is an abundant number, since it is smaller than the sum of its proper divisors (149763968180).

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

111021020200 is a wasteful number, since it uses less digits than its factorization.

111021020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722846 (or 5722837 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111021020200 its reverse (2020120111), we get a palindrome (113041140311).

The spelling of 111021020200 in words is "one hundred eleven billion, twenty-one million, twenty thousand, two hundred".