138113111 has 2 divisors, whose sum is σ = 138113112. Its totient is φ = 138113110.

The previous prime is 138113099. The next prime is 138113141. The reversal of 138113111 is 111311831.

138113111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138113111 - 2²⁶ = 71004247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138113141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69056555 + 69056556.

It is an arithmetic number, because the mean of its divisors is an integer number (69056556).

Almost surely, 2^138113111 is an apocalyptic number.

138113111 is a deficient number, since it is larger than the sum of its proper divisors (1).

138113111 is an equidigital number, since it uses as much as digits as its factorization.

138113111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 20.

The square root of 138113111 is about 11752.1534622383. The cubic root of 138113111 is about 516.9060745958.

Adding to 138113111 its reverse (111311831), we get a palindrome (249424942).

The spelling of 138113111 in words is "one hundred thirty-eight million, one hundred thirteen thousand, one hundred eleven".