138822111 has 24 divisors (see below), whose sum is σ = 205714080. Its totient is φ = 90182400.

The previous prime is 138822107. The next prime is 138822127. The reversal of 138822111 is 111228831.

It is not a de Polignac number, because 138822111 - 2² = 138822107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138822311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55651 + ... + 58091.

It is an arithmetic number, because the mean of its divisors is an integer number (8571420).

Almost surely, 2^138822111 is an apocalyptic number.

138822111 is a deficient number, since it is larger than the sum of its proper divisors (66891969).

138822111 is a wasteful number, since it uses less digits than its factorization.

138822111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607 (or 2604 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 138822111 is about 11782.2795332652. The cubic root of 138822111 is about 517.7890732495.

The spelling of 138822111 in words is "one hundred thirty-eight million, eight hundred twenty-two thousand, one hundred eleven".