211212101211100 has 144 divisors (see below), whose sum is σ = 501052223105280. Its totient is φ = 76642349324800.

The previous prime is 211212101211073. The next prime is 211212101211179. The reversal of 211212101211100 is 1112101212112.

It is a super-2 number, since 2×211212101211100² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1816929579 + ... + 1817045821.

It is an arithmetic number, because the mean of its divisors is an integer number (3479529327120).

Almost surely, 2^{211212101211100} is an apocalyptic number.

211212101211100 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 211212101211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250526111552640).

211212101211100 is an abundant number, since it is smaller than the sum of its proper divisors (289840121894180).

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

211212101211100 is a wasteful number, since it uses less digits than its factorization.

211212101211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119740 (or 119733 counting only the distinct ones).

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

Adding to 211212101211100 its reverse (1112101212112), we get a palindrome (212324202423212).

The spelling of 211212101211100 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred one million, two hundred eleven thousand, one hundred".