11212319917 has 2 divisors, whose sum is σ = 11212319918. Its totient is φ = 11212319916.

The previous prime is 11212319891. The next prime is 11212320011. The reversal of 11212319917 is 71991321211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6018811561 + 5193508356 = 77581^2 + 72066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212319917 is a prime.

It is a super-2 number, since 2×11212319917² (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 (11212319717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606159958 + 5606159959.

It is an arithmetic number, because the mean of its divisors is an integer number (5606159959).

Almost surely, 2^11212319917 is an apocalyptic number.

It is an amenable number.

11212319917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212319917 is an equidigital number, since it uses as much as digits as its factorization.

11212319917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 37.

The spelling of 11212319917 in words is "eleven billion, two hundred twelve million, three hundred nineteen thousand, nine hundred seventeen".