111213404171 has 2 divisors, whose sum is σ = 111213404172. Its totient is φ = 111213404170.

The previous prime is 111213404129. The next prime is 111213404209. The reversal of 111213404171 is 171404312111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111213404171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111213404171.

It is not a weakly prime, because it can be changed into another prime (111213409171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606702085 + 55606702086.

It is an arithmetic number, because the mean of its divisors is an integer number (55606702086).

Almost surely, 2^111213404171 is an apocalyptic number.

111213404171 is a deficient number, since it is larger than the sum of its proper divisors (1).

111213404171 is an equidigital number, since it uses as much as digits as its factorization.

111213404171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 111213404171 its reverse (171404312111), we get a palindrome (282617716282).

The spelling of 111213404171 in words is "one hundred eleven billion, two hundred thirteen million, four hundred four thousand, one hundred seventy-one".