212221321210 has 32 divisors (see below), whose sum is σ = 404590800960. Its totient is φ = 79871000832.

The previous prime is 212221321189. The next prime is 212221321217. The reversal of 212221321210 is 12123122212.

It is a super-2 number, since 2×212221321210² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212221321217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382501 + ... + 755479.

It is an arithmetic number, because the mean of its divisors is an integer number (12643462530).

Almost surely, 2^212221321210 is an apocalyptic number.

212221321210 is a deficient number, since it is larger than the sum of its proper divisors (192369479750).

212221321210 is a wasteful number, since it uses less digits than its factorization.

212221321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376350.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212221321210 its reverse (12123122212), we get a palindrome (224344443422).

The spelling of 212221321210 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred ten".