111104377781 has 2 divisors, whose sum is σ = 111104377782. Its totient is φ = 111104377780.

The previous prime is 111104377739. The next prime is 111104377799. The reversal of 111104377781 is 187773401111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56247711556 + 54856666225 = 237166^2 + 234215^2 .

It is a cyclic number.

It is not a de Polignac number, because 111104377781 - 2¹⁴ = 111104361397 is a prime.

It is a super-2 number, since 2×111104377781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111104377981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55552188890 + 55552188891.

It is an arithmetic number, because the mean of its divisors is an integer number (55552188891).

Almost surely, 2^111104377781 is an apocalyptic number.

It is an amenable number.

111104377781 is a deficient number, since it is larger than the sum of its proper divisors (1).

111104377781 is an equidigital number, since it uses as much as digits as its factorization.

111104377781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 41.

Adding to 111104377781 its reverse (187773401111), we get a palindrome (298877778892).

The spelling of 111104377781 in words is "one hundred eleven billion, one hundred four million, three hundred seventy-seven thousand, seven hundred eighty-one".