212021210322 has 48 divisors (see below), whose sum is σ = 476986887000. Its totient is φ = 67982998272.

The previous prime is 212021210309. The next prime is 212021210329. The reversal of 212021210322 is 223012120212.

212021210322 is a `hidden beast` number, since 2 + 120 + 212 + 10 + 322 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 104213398041 + 107807812281 = 322821^2 + 328341^2 .

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 = 212021210295 and 212021210304.

It is not an unprimeable number, because it can be changed into a prime (212021210329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 614547 + ... + 895382.

Almost surely, 2^212021210322 is an apocalyptic number.

212021210322 is an abundant number, since it is smaller than the sum of its proper divisors (264965676678).

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

212021210322 is a wasteful number, since it uses less digits than its factorization.

212021210322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510235 (or 1510232 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212021210322 its reverse (223012120212), we get a palindrome (435033330534).

The spelling of 212021210322 in words is "two hundred twelve billion, twenty-one million, two hundred ten thousand, three hundred twenty-two".