211212121222122 has 32 divisors (see below), whose sum is σ = 434511656836992. Its totient is φ = 68395353297984.

The previous prime is 211212121222121. The next prime is 211212121222129. The reversal of 211212121222122 is 221222121212112.

It is a super-3 number, since 3×211212121222122³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 211212121222092 and 211212121222101.

It is not an unprimeable number, because it can be changed into a prime (211212121222121) 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 15 ways as a sum of consecutive naturals, for example, 735100533 + ... + 735387800.

It is an arithmetic number, because the mean of its divisors is an integer number (13578489276156).

Almost surely, 2^{211212121222122} is an apocalyptic number.

211212121222122 is an abundant number, since it is smaller than the sum of its proper divisors (223299535614870).

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

211212121222122 is a wasteful number, since it uses less digits than its factorization.

211212121222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470489022.

The product of its digits is 512, while the sum is 24.

Adding to 211212121222122 its reverse (221222121212112), we get a palindrome (432434242434234).

The spelling of 211212121222122 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-two".