10111993009 has 2 divisors, whose sum is σ = 10111993010. Its totient is φ = 10111993008.

The previous prime is 10111992953. The next prime is 10111993037. The reversal of 10111993009 is 90039911101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10045651984 + 66341025 = 100228^2 + 8145^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111993009 - 2¹⁵ = 10111960241 is a prime.

It is a super-2 number, since 2×10111993009² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10111993039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055996504 + 5055996505.

It is an arithmetic number, because the mean of its divisors is an integer number (5055996505).

Almost surely, 2^10111993009 is an apocalyptic number.

It is an amenable number.

10111993009 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111993009 is an equidigital number, since it uses as much as digits as its factorization.

10111993009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 34.

The spelling of 10111993009 in words is "ten billion, one hundred eleven million, nine hundred ninety-three thousand, nine".