212113122 has 32 divisors (see below), whose sum is σ = 459950400. Its totient is φ = 64824000.

The previous prime is 212113117. The next prime is 212113141. The reversal of 212113122 is 221311212.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2497 + ... + 20747.

It is an arithmetic number, because the mean of its divisors is an integer number (14373450).

Almost surely, 2^212113122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212113122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229975200).

212113122 is an abundant number, since it is smaller than the sum of its proper divisors (247837278).

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

212113122 is a wasteful number, since it uses less digits than its factorization.

212113122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18418.

The product of its digits is 48, while the sum is 15.

The square root of 212113122 is about 14564.1038859245. The cubic root of 212113122 is about 596.3792329170.

Adding to 212113122 its reverse (221311212), we get a palindrome (433424334).

The spelling of 212113122 in words is "two hundred twelve million, one hundred thirteen thousand, one hundred twenty-two".