212122234 has 4 divisors (see below), whose sum is σ = 318183354. Its totient is φ = 106061116.

The previous prime is 212122199. The next prime is 212122237. The reversal of 212122234 is 432221212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 169911225 + 42211009 = 13035^2 + 6497^2 .

It is not an unprimeable number, because it can be changed into a prime (212122237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53030557 + ... + 53030560.

Almost surely, 2^212122234 is an apocalyptic number.

212122234 is a deficient number, since it is larger than the sum of its proper divisors (106061120).

212122234 is a wasteful number, since it uses less digits than its factorization.

212122234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106061119.

The product of its digits is 384, while the sum is 19.

The square root of 212122234 is about 14564.4167064802. The cubic root of 212122234 is about 596.3877725895.

Adding to 212122234 its reverse (432221212), we get a palindrome (644343446).

The spelling of 212122234 in words is "two hundred twelve million, one hundred twenty-two thousand, two hundred thirty-four".