10118991811 has 2 divisors, whose sum is σ = 10118991812. Its totient is φ = 10118991810.

The previous prime is 10118991809. The next prime is 10118991833. The reversal of 10118991811 is 11819981101.

It is a weak prime.

It is an emirp because it is prime and its reverse (11819981101) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 11816681101 and 10118661811.

It is a cyclic number.

It is not a de Polignac number, because 10118991811 - 2¹ = 10118991809 is a prime.

It is a super-3 number, since 3×10118991811³ (a number of 31 digits) contains 333 as substring.

Together with 10118991809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10118991851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5059495905 + 5059495906.

It is an arithmetic number, because the mean of its divisors is an integer number (5059495906).

Almost surely, 2^10118991811 is an apocalyptic number.

10118991811 is a deficient number, since it is larger than the sum of its proper divisors (1).

10118991811 is an equidigital number, since it uses as much as digits as its factorization.

10118991811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 40.

The spelling of 10118991811 in words is "ten billion, one hundred eighteen million, nine hundred ninety-one thousand, eight hundred eleven".