It is a tau number, because it is divible by the number of its divisors (18).
It is an ABA number since it can be written as A⋅BA, here for A=2, B=8331.
It is an unprimeable number.
Almost surely, 2138811122 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
138811122 is an frugal number, since it uses more digits than its factorization.
138811122 is an evil number, because the sum of its binary digits is even.
The square root of 138811122 is about 11781.8131881303. The cubic root of 138811122 is about 517.7754103581.
Adding to 138811122 its reverse (221118831), we get a palindrome (359929953).
The spelling of 138811122 in words is "one hundred thirty-eight million, eight hundred eleven thousand, one hundred twenty-two".