116121111 has 4 divisors (see below), whose sum is σ = 154828152. Its totient is φ = 77414072.

The previous prime is 116121097. The next prime is 116121119. The reversal of 116121111 is 111121611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111121611 = 3 ⋅37040537.

It is a cyclic number.

It is not a de Polignac number, because 116121111 - 2¹⁰ = 116120087 is a prime.

It is a super-2 number, since 2×116121111² = 26968224839748642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116121119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19353516 + ... + 19353521.

It is an arithmetic number, because the mean of its divisors is an integer number (38707038).

Almost surely, 2^116121111 is an apocalyptic number.

116121111 is a deficient number, since it is larger than the sum of its proper divisors (38707041).

116121111 is an equidigital number, since it uses as much as digits as its factorization.

116121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38707040.

The product of its digits is 12, while the sum is 15.

The square root of 116121111 is about 10775.9505845192. The cubic root of 116121111 is about 487.8695664462.

Adding to 116121111 its reverse (111121611), we get a palindrome (227242722).

The spelling of 116121111 in words is "one hundred sixteen million, one hundred twenty-one thousand, one hundred eleven".