212011121200100 has 144 divisors (see below), whose sum is σ = 490419004299840. Its totient is φ = 79442255155200.

The previous prime is 212011121200069. The next prime is 212011121200181. The reversal of 212011121200100 is 1002121110212.

It is an unprimeable number.

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, 210524 + ... + 20592876.

It is an arithmetic number, because the mean of its divisors is an integer number (3405687529860).

Almost surely, 2^{212011121200100} is an apocalyptic number.

212011121200100 is a gapful number since it is divisible by the number (20) 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 212011121200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245209502149920).

212011121200100 is an abundant number, since it is smaller than the sum of its proper divisors (278407883099740).

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

212011121200100 is a wasteful number, since it uses less digits than its factorization.

212011121200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20382510 (or 20382503 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212011121200100 its reverse (1002121110212), we get a palindrome (213013242310312).

The spelling of 212011121200100 in words is "two hundred twelve trillion, eleven billion, one hundred twenty-one million, two hundred thousand, one hundred".