138212571128 has 16 divisors (see below), whose sum is σ = 259473737880. Its totient is φ = 69019574368.

The previous prime is 138212571127. The next prime is 138212571137. The reversal of 138212571128 is 821175212831.

138212571128 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 congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 10832126 + ... + 10844877.

Almost surely, 2^138212571128 is an apocalyptic number.

It is an amenable number.

138212571128 is a deficient number, since it is larger than the sum of its proper divisors (121261166752).

138212571128 is a wasteful number, since it uses less digits than its factorization.

138212571128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21677806 (or 21677802 counting only the distinct ones).

The product of its digits is 53760, while the sum is 41.

Adding to 138212571128 its reverse (821175212831), we get a palindrome (959387783959).

The spelling of 138212571128 in words is "one hundred thirty-eight billion, two hundred twelve million, five hundred seventy-one thousand, one hundred twenty-eight".