117212809919 has 2 divisors, whose sum is σ = 117212809920. Its totient is φ = 117212809918.

The previous prime is 117212809877. The next prime is 117212809927. The reversal of 117212809919 is 919908212711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117212809919 - 2⁸ = 117212809663 is a prime.

It is a super-2 number, since 2×117212809919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117212809939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58606404959 + 58606404960.

It is an arithmetic number, because the mean of its divisors is an integer number (58606404960).

Almost surely, 2^117212809919 is an apocalyptic number.

117212809919 is a deficient number, since it is larger than the sum of its proper divisors (1).

117212809919 is an equidigital number, since it uses as much as digits as its factorization.

117212809919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 50.

The spelling of 117212809919 in words is "one hundred seventeen billion, two hundred twelve million, eight hundred nine thousand, nine hundred nineteen".