11213431211 has 2 divisors, whose sum is σ = 11213431212. Its totient is φ = 11213431210.

The previous prime is 11213431181. The next prime is 11213431237.

11213431211 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11213431211 is a prime.

It is not a weakly prime, because it can be changed into another prime (11213431111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606715605 + 5606715606.

It is an arithmetic number, because the mean of its divisors is an integer number (5606715606).

Almost surely, 2^11213431211 is an apocalyptic number.

11213431211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213431211 is an equidigital number, since it uses as much as digits as its factorization.

11213431211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The spelling of 11213431211 in words is "eleven billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred eleven".