111020111173 has 2 divisors, whose sum is σ = 111020111174. Its totient is φ = 111020111172.

The previous prime is 111020111161. The next prime is 111020111219. The reversal of 111020111173 is 371111020111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82370148004 + 28649963169 = 287002^2 + 169263^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020111173 - 2¹⁷ = 111019980101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111020111173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111020111143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510055586 + 55510055587.

It is an arithmetic number, because the mean of its divisors is an integer number (55510055587).

Almost surely, 2^111020111173 is an apocalyptic number.

It is an amenable number.

111020111173 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020111173 is an equidigital number, since it uses as much as digits as its factorization.

111020111173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 19.

Adding to 111020111173 its reverse (371111020111), we get a palindrome (482131131284).

The spelling of 111020111173 in words is "one hundred eleven billion, twenty million, one hundred eleven thousand, one hundred seventy-three".