212321122 has 24 divisors (see below), whose sum is σ = 356773140. Its totient is φ = 94610880.

The previous prime is 212321113. The next prime is 212321129. The reversal of 212321122 is 221123212.

It is a happy number.

212321122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 19971961 + 192349161 = 4469^2 + 13869^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212321096 and 212321105.

It is not an unprimeable number, because it can be changed into a prime (212321129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1029 + ... + 20632.

Almost surely, 2^212321122 is an apocalyptic number.

212321122 is a deficient number, since it is larger than the sum of its proper divisors (144452018).

212321122 is a wasteful number, since it uses less digits than its factorization.

212321122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21718 (or 21705 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 212321122 is about 14571.2429806108. The cubic root of 212321122 is about 596.5741074793.

Adding to 212321122 its reverse (221123212), we get a palindrome (433444334).

The spelling of 212321122 in words is "two hundred twelve million, three hundred twenty-one thousand, one hundred twenty-two".