11219978117 has 2 divisors, whose sum is σ = 11219978118. Its totient is φ = 11219978116.

The previous prime is 11219978093. The next prime is 11219978177. The reversal of 11219978117 is 71187991211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11166994276 + 52983841 = 105674^2 + 7279^2 .

It is an emirp because it is prime and its reverse (71187991211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11219978117 - 2²⁴ = 11203200901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11219978177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609989058 + 5609989059.

It is an arithmetic number, because the mean of its divisors is an integer number (5609989059).

Almost surely, 2^11219978117 is an apocalyptic number.

It is an amenable number.

11219978117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11219978117 is an equidigital number, since it uses as much as digits as its factorization.

11219978117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 47.

The spelling of 11219978117 in words is "eleven billion, two hundred nineteen million, nine hundred seventy-eight thousand, one hundred seventeen".