138306751212 has 96 divisors (see below), whose sum is σ = 372801157120. Its totient is φ = 39089848320.

The previous prime is 138306751159. The next prime is 138306751217. The reversal of 138306751212 is 212157603831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138306751217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33494364 + ... + 33498492.

Almost surely, 2^138306751212 is an apocalyptic number.

138306751212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138306751212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186400578560).

138306751212 is an abundant number, since it is smaller than the sum of its proper divisors (234494405908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138306751212 is a wasteful number, since it uses less digits than its factorization.

138306751212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351 (or 8349 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 138306751212 in words is "one hundred thirty-eight billion, three hundred six million, seven hundred fifty-one thousand, two hundred twelve".