212221231113 has 16 divisors (see below), whose sum is σ = 290631424896. Its totient is φ = 137646512640.

The previous prime is 212221231111. The next prime is 212221231141. The reversal of 212221231113 is 311132122212.

It is not a de Polignac number, because 212221231113 - 2¹ = 212221231111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212221231113.

It is not an unprimeable number, because it can be changed into a prime (212221231111) 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, 1550620 + ... + 1681922.

It is an arithmetic number, because the mean of its divisors is an integer number (18164464056).

Almost surely, 2^212221231113 is an apocalyptic number.

It is an amenable number.

212221231113 is a deficient number, since it is larger than the sum of its proper divisors (78410193783).

212221231113 is a wasteful number, since it uses less digits than its factorization.

212221231113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145904.

The product of its digits is 288, while the sum is 21.

Adding to 212221231113 its reverse (311132122212), we get a palindrome (523353353325).

The spelling of 212221231113 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred thirty-one thousand, one hundred thirteen".