213122231213 has 16 divisors (see below), whose sum is σ = 218165828160. Its totient is φ = 208127563776.

The previous prime is 213122231197. The next prime is 213122231219. The reversal of 213122231213 is 312132221312.

It is a cyclic number.

It is not a de Polignac number, because 213122231213 - 2⁴ = 213122231197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122231219) 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, 29203181 + ... + 29210477.

It is an arithmetic number, because the mean of its divisors is an integer number (13635364260).

Almost surely, 2^213122231213 is an apocalyptic number.

It is an amenable number.

213122231213 is a deficient number, since it is larger than the sum of its proper divisors (5043596947).

213122231213 is a wasteful number, since it uses less digits than its factorization.

213122231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556.

The product of its digits is 864, while the sum is 23.

Adding to 213122231213 its reverse (312132221312), we get a palindrome (525254452525).

Subtracting 213122231213 from its reverse (312132221312), we obtain a palindrome (99009990099).

The spelling of 213122231213 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred thirteen".