138212571122 has 4 divisors (see below), whose sum is σ = 207318856686. Its totient is φ = 69106285560.

The previous prime is 138212571103. The next prime is 138212571127. The reversal of 138212571122 is 221175212831.

It is a happy number.

138212571122 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 113150831641 + 25061739481 = 336379^2 + 158309^2 .

It is not an unprimeable number, because it can be changed into a prime (138212571127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34553142779 + ... + 34553142782.

Almost surely, 2^138212571122 is an apocalyptic number.

138212571122 is a deficient number, since it is larger than the sum of its proper divisors (69106285564).

138212571122 is an equidigital number, since it uses as much as digits as its factorization.

138212571122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69106285563.

The product of its digits is 13440, while the sum is 35.

Adding to 138212571122 its reverse (221175212831), we get a palindrome (359387783953).

The spelling of 138212571122 in words is "one hundred thirty-eight billion, two hundred twelve million, five hundred seventy-one thousand, one hundred twenty-two".