10191189881 has 2 divisors, whose sum is σ = 10191189882. Its totient is φ = 10191189880.

The previous prime is 10191189793. The next prime is 10191189917. The reversal of 10191189881 is 18898119101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7090482025 + 3100707856 = 84205^2 + 55684^2 .

It is an emirp because it is prime and its reverse (18898119101) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 18868116101 and 10161186881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10191189881 is a prime.

It is a super-2 number, since 2×10191189881² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10191179881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095594940 + 5095594941.

It is an arithmetic number, because the mean of its divisors is an integer number (5095594941).

Almost surely, 2^10191189881 is an apocalyptic number.

It is an amenable number.

10191189881 is a deficient number, since it is larger than the sum of its proper divisors (1).

10191189881 is an equidigital number, since it uses as much as digits as its factorization.

10191189881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 47.

The spelling of 10191189881 in words is "ten billion, one hundred ninety-one million, one hundred eighty-nine thousand, eight hundred eighty-one".