111212000102100 has 144 divisors (see below), whose sum is σ = 323597397816000. Its totient is φ = 29488599275520.

The previous prime is 111212000102059. The next prime is 111212000102101. The reversal of 111212000102100 is 1201000212111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212000102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99857116 + ... + 100964684.

It is an arithmetic number, because the mean of its divisors is an integer number (2247204151500).

Almost surely, 2^{111212000102100} is an apocalyptic number.

111212000102100 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 111212000102100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161798698908000).

111212000102100 is an abundant number, since it is smaller than the sum of its proper divisors (212385397713900).

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

111212000102100 is a wasteful number, since it uses less digits than its factorization.

111212000102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109482 (or 1109475 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111212000102100 its reverse (1201000212111), we get a palindrome (112413000314211).

The spelling of 111212000102100 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred two thousand, one hundred".