111355400217 has 4 divisors (see below), whose sum is σ = 148473866960. Its totient is φ = 74236933476.

The previous prime is 111355400201. The next prime is 111355400239. The reversal of 111355400217 is 712004553111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712004553111 = 3 ⋅237334851037.

It is not a de Polignac number, because 111355400217 - 2⁴ = 111355400201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111355400267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18559233367 + ... + 18559233372.

It is an arithmetic number, because the mean of its divisors is an integer number (37118466740).

Almost surely, 2^111355400217 is an apocalyptic number.

It is an amenable number.

111355400217 is a deficient number, since it is larger than the sum of its proper divisors (37118466743).

111355400217 is an equidigital number, since it uses as much as digits as its factorization.

111355400217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37118466742.

The product of its (nonzero) digits is 4200, while the sum is 30.

Adding to 111355400217 its reverse (712004553111), we get a palindrome (823359953328).

The spelling of 111355400217 in words is "one hundred eleven billion, three hundred fifty-five million, four hundred thousand, two hundred seventeen".