138721210271 has 8 divisors (see below), whose sum is σ = 158627457024. Its totient is φ = 118837196280.

The previous prime is 138721210267. The next prime is 138721210339. The reversal of 138721210271 is 172012127831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138721210271 - 2² = 138721210267 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138721212271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5544815 + ... + 5569776.

It is an arithmetic number, because the mean of its divisors is an integer number (19828432128).

Almost surely, 2^138721210271 is an apocalyptic number.

138721210271 is a deficient number, since it is larger than the sum of its proper divisors (19906246753).

138721210271 is a wasteful number, since it uses less digits than its factorization.

138721210271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11116381.

The product of its (nonzero) digits is 9408, while the sum is 35.

The spelling of 138721210271 in words is "one hundred thirty-eight billion, seven hundred twenty-one million, two hundred ten thousand, two hundred seventy-one".