212212122 has 64 divisors (see below), whose sum is σ = 472055040. Its totient is φ = 63478272.

The previous prime is 212212093. The next prime is 212212123. The reversal of 212212122 is 221212212.

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

It is not an unprimeable number, because it can be changed into a prime (212212123) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 677838 + ... + 678150.

It is an arithmetic number, because the mean of its divisors is an integer number (7375860).

Almost surely, 2^212212122 is an apocalyptic number.

212212122 is an abundant number, since it is smaller than the sum of its proper divisors (259842918).

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

212212122 is a wasteful number, since it uses less digits than its factorization.

212212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 358 counting only the distinct ones).

The product of its digits is 64, while the sum is 15.

The square root of 212212122 is about 14567.5022567357. The cubic root of 212212122 is about 596.4720015937.

Adding to 212212122 its reverse (221212212), we get a palindrome (433424334).

The spelling of 212212122 in words is "two hundred twelve million, two hundred twelve thousand, one hundred twenty-two".