211111133213 has 2 divisors, whose sum is σ = 211111133214. Its totient is φ = 211111133212.

The previous prime is 211111133197. The next prime is 211111133239. The reversal of 211111133213 is 312331111112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205139243929 + 5971889284 = 452923^2 + 77278^2 .

It is a cyclic number.

It is not a de Polignac number, because 211111133213 - 2⁴ = 211111133197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211111133293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555566606 + 105555566607.

It is an arithmetic number, because the mean of its divisors is an integer number (105555566607).

Almost surely, 2^211111133213 is an apocalyptic number.

It is an amenable number.

211111133213 is a deficient number, since it is larger than the sum of its proper divisors (1).

211111133213 is an equidigital number, since it uses as much as digits as its factorization.

211111133213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

Adding to 211111133213 its reverse (312331111112), we get a palindrome (523442244325).

The spelling of 211111133213 in words is "two hundred eleven billion, one hundred eleven million, one hundred thirty-three thousand, two hundred thirteen".