11212331213 has 4 divisors (see below), whose sum is σ = 11485802748. Its totient is φ = 10938859680.

The previous prime is 11212331201. The next prime is 11212331257. The reversal of 11212331213 is 31213321211.

It is a happy number.

11212331213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2297572489 + 8914758724 = 47933^2 + 94418^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212331213 - 2⁸ = 11212330957 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 (11212333213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 136735706 + ... + 136735787.

It is an arithmetic number, because the mean of its divisors is an integer number (2871450687).

Almost surely, 2^11212331213 is an apocalyptic number.

It is an amenable number.

11212331213 is a deficient number, since it is larger than the sum of its proper divisors (273471535).

11212331213 is an equidigital number, since it uses as much as digits as its factorization.

11212331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273471534.

The product of its digits is 216, while the sum is 20.

Adding to 11212331213 its reverse (31213321211), we get a palindrome (42425652424).

The spelling of 11212331213 in words is "eleven billion, two hundred twelve million, three hundred thirty-one thousand, two hundred thirteen".