212021122 has 4 divisors (see below), whose sum is σ = 318031686. Its totient is φ = 106010560.

The previous prime is 212021113. The next prime is 212021141. The reversal of 212021122 is 221120212.

It is a happy number.

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., 204175521 + 7845601 = 14289^2 + 2801^2 .

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 as a sum of consecutive naturals, namely, 53005279 + ... + 53005282.

Almost surely, 2^212021122 is an apocalyptic number.

212021122 is a deficient number, since it is larger than the sum of its proper divisors (106010564).

212021122 is a wasteful number, since it uses less digits than its factorization.

212021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106010563.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212021122 is about 14560.9450929533. The cubic root of 212021122 is about 596.2929977621.

Adding to 212021122 its reverse (221120212), we get a palindrome (433141334).

The spelling of 212021122 in words is "two hundred twelve million, twenty-one thousand, one hundred twenty-two".