101111111200 has 144 divisors (see below), whose sum is σ = 273693107520. Its totient is φ = 36164736000.

The previous prime is 101111111177. The next prime is 101111111201. The reversal of 101111111200 is 2111111101.

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 (101111111201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 442621 + ... + 630979.

It is an arithmetic number, because the mean of its divisors is an integer number (1900646580).

Almost surely, 2^101111111200 is an apocalyptic number.

101111111200 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 101111111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136846553760).

101111111200 is an abundant number, since it is smaller than the sum of its proper divisors (172581996320).

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

101111111200 is a wasteful number, since it uses less digits than its factorization.

101111111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188451 (or 188438 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 101111111200 its reverse (2111111101), we get a palindrome (103222222301).

Subtracting from 101111111200 its reverse (2111111101), we obtain a palindrome (99000000099).

The spelling of 101111111200 in words is "one hundred one billion, one hundred eleven million, one hundred eleven thousand, two hundred".