11231113213 has 2 divisors, whose sum is σ = 11231113214. Its totient is φ = 11231113212.

The previous prime is 11231113207. The next prime is 11231113217. The reversal of 11231113213 is 31231113211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10493338969 + 737774244 = 102437^2 + 27162^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231113213 - 2⁵ = 11231113181 is a prime.

It is a super-2 number, since 2×11231113213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11231113217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615556606 + 5615556607.

It is an arithmetic number, because the mean of its divisors is an integer number (5615556607).

Almost surely, 2^11231113213 is an apocalyptic number.

It is an amenable number.

11231113213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231113213 is an equidigital number, since it uses as much as digits as its factorization.

11231113213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 19.

Adding to 11231113213 its reverse (31231113211), we get a palindrome (42462226424).

The spelling of 11231113213 in words is "eleven billion, two hundred thirty-one million, one hundred thirteen thousand, two hundred thirteen".