212422122 has 32 divisors (see below), whose sum is σ = 514964160. Its totient is φ = 64370160.

The previous prime is 212422087. The next prime is 212422127. The reversal of 212422122 is 221224212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212422095 and 212422104.

It is not an unprimeable number, because it can be changed into a prime (212422127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178213 + ... + 179400.

It is an arithmetic number, because the mean of its divisors is an integer number (16092630).

Almost surely, 2^212422122 is an apocalyptic number.

212422122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212422122 is an abundant number, since it is smaller than the sum of its proper divisors (302542038).

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

212422122 is a wasteful number, since it uses less digits than its factorization.

212422122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357635 (or 357629 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 212422122 is about 14574.7082989678. The cubic root of 212422122 is about 596.6686881670.

Adding to 212422122 its reverse (221224212), we get a palindrome (433646334).

The spelling of 212422122 in words is "two hundred twelve million, four hundred twenty-two thousand, one hundred twenty-two".