212122122 has 16 divisors (see below), whose sum is σ = 428619072. Its totient is φ = 69978240.

The previous prime is 212122121. The next prime is 212122129. The reversal of 212122122 is 221221212.

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 (212122121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181654 + ... + 182817.

It is an arithmetic number, because the mean of its divisors is an integer number (26788692).

Almost surely, 2^212122122 is an apocalyptic number.

212122122 is an abundant number, since it is smaller than the sum of its proper divisors (216496950).

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

212122122 is a wasteful number, since it uses less digits than its factorization.

212122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364573.

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

The square root of 212122122 is about 14564.4128614922. The cubic root of 212122122 is about 596.3876676257.

Adding to 212122122 its reverse (221221212), we get a palindrome (433343334).

The spelling of 212122122 in words is "two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-two".