111213020100 has 576 divisors, whose sum is σ = 424508829696. Its totient is φ = 21833349120.

The previous prime is 111213020081. The next prime is 111213020101. The reversal of 111213020100 is 1020312111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (111213020101) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 23229907 + ... + 23234693.

It is an arithmetic number, because the mean of its divisors is an integer number (736994496).

Almost surely, 2^111213020100 is an apocalyptic number.

111213020100 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 111213020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212254414848).

111213020100 is an abundant number, since it is smaller than the sum of its proper divisors (313295809596).

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

111213020100 is a wasteful number, since it uses less digits than its factorization.

111213020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884 (or 4877 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 111213020100 its reverse (1020312111), we get a palindrome (112233332211).

The spelling of 111213020100 in words is "one hundred eleven billion, two hundred thirteen million, twenty thousand, one hundred".