212211213210 has 24 divisors (see below), whose sum is σ = 551749154580. Its totient is φ = 56589656832.

The previous prime is 212211213191. The next prime is 212211213241. The reversal of 212211213210 is 12312112212.

212211213210 is a `hidden beast` number, since 2 + 1 + 221 + 121 + 321 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 211621160529 + 590052681 = 460023^2 + 24291^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178951095 + ... + 1178951274.

Almost surely, 2^212211213210 is an apocalyptic number.

212211213210 is an abundant number, since it is smaller than the sum of its proper divisors (339537941370).

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

212211213210 is a wasteful number, since it uses less digits than its factorization.

212211213210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357902382 (or 2357902379 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212211213210 its reverse (12312112212), we get a palindrome (224523325422).

The spelling of 212211213210 in words is "two hundred twelve billion, two hundred eleven million, two hundred thirteen thousand, two hundred ten".