20112212213 has 4 divisors (see below), whose sum is σ = 20149388748. Its totient is φ = 20075035680.

The previous prime is 20112212203. The next prime is 20112212251. The reversal of 20112212213 is 31221221102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10737518884 + 9374693329 = 103622^2 + 96823^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112212213 - 2¹⁸ = 20111950069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112212191 and 20112212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112212203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18587456 + ... + 18588537.

It is an arithmetic number, because the mean of its divisors is an integer number (5037347187).

Almost surely, 2^20112212213 is an apocalyptic number.

It is an amenable number.

20112212213 is a deficient number, since it is larger than the sum of its proper divisors (37176535).

20112212213 is an equidigital number, since it uses as much as digits as its factorization.

20112212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37176534.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20112212213 its reverse (31221221102), we get a palindrome (51333433315).

The spelling of 20112212213 in words is "twenty billion, one hundred twelve million, two hundred twelve thousand, two hundred thirteen".