10111212173 has 2 divisors, whose sum is σ = 10111212174. Its totient is φ = 10111212172.

The previous prime is 10111212161. The next prime is 10111212187. The reversal of 10111212173 is 37121211101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7800775684 + 2310436489 = 88322^2 + 48067^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111212173 - 2⁶ = 10111212109 is a prime.

It is a super-2 number, since 2×10111212173² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055606086 + 5055606087.

It is an arithmetic number, because the mean of its divisors is an integer number (5055606087).

Almost surely, 2^10111212173 is an apocalyptic number.

It is an amenable number.

10111212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111212173 is an equidigital number, since it uses as much as digits as its factorization.

10111212173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 10111212173 its reverse (37121211101), we get a palindrome (47232423274).

The spelling of 10111212173 in words is "ten billion, one hundred eleven million, two hundred twelve thousand, one hundred seventy-three".