11155166213 has 2 divisors, whose sum is σ = 11155166214. Its totient is φ = 11155166212.

The previous prime is 11155166179. The next prime is 11155166237. The reversal of 11155166213 is 31266155111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10112715844 + 1042450369 = 100562^2 + 32287^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155166213 - 2²⁶ = 11088057349 is a prime.

It is a super-2 number, since 2×11155166213² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11155166213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155166413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577583106 + 5577583107.

It is an arithmetic number, because the mean of its divisors is an integer number (5577583107).

Almost surely, 2^11155166213 is an apocalyptic number.

It is an amenable number.

11155166213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155166213 is an equidigital number, since it uses as much as digits as its factorization.

11155166213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 32.

The spelling of 11155166213 in words is "eleven billion, one hundred fifty-five million, one hundred sixty-six thousand, two hundred thirteen".