212001222 has 16 divisors (see below), whose sum is σ = 428201712. Its totient is φ = 69967200.

The previous prime is 212001149. The next prime is 212001233. The reversal of 212001222 is 222100212.

It is a junction number, because it is equal to n+sod(n) for n = 212001198 and 212001207.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 174313 + ... + 175524.

It is an arithmetic number, because the mean of its divisors is an integer number (26762607).

Almost surely, 2^212001222 is an apocalyptic number.

212001222 is an abundant number, since it is smaller than the sum of its proper divisors (216200490).

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

212001222 is a wasteful number, since it uses less digits than its factorization.

212001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349943.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 212001222 is about 14560.2617421529. The cubic root of 212001222 is about 596.2743414417.

Adding to 212001222 its reverse (222100212), we get a palindrome (434101434).

It can be divided in two parts, 21200 and 1222, that added together give a palindrome (22422).

The spelling of 212001222 in words is "two hundred twelve million, one thousand, two hundred twenty-two".