100011211212 has 96 divisors (see below), whose sum is σ = 257372849664. Its totient is φ = 29973888000.

The previous prime is 100011211211. The next prime is 100011211229. The reversal of 100011211212 is 212112110001.

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 (100011211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14168388 + ... + 14175444.

It is an arithmetic number, because the mean of its divisors is an integer number (2680967184).

Almost surely, 2^100011211212 is an apocalyptic number.

100011211212 is a gapful number since it is divisible by the number (12) 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 100011211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128686424832).

100011211212 is an abundant number, since it is smaller than the sum of its proper divisors (157361638452).

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

100011211212 is a wasteful number, since it uses less digits than its factorization.

100011211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239 (or 8237 counting only the distinct ones).

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

Adding to 100011211212 its reverse (212112110001), we get a palindrome (312123321213).

The spelling of 100011211212 in words is "one hundred billion, eleven million, two hundred eleven thousand, two hundred twelve".