138950540021201 has 8 divisors (see below), whose sum is σ = 144177155489640. Its totient is φ = 133801355893248.

The previous prime is 138950540021179. The next prime is 138950540021231. The reversal of 138950540021201 is 102120045059831.

It can be written as a sum of positive squares in 4 ways, for example, as 62275140931600 + 76675399089601 = 7891460^2 + 8756449^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138950540021201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138950540021231) 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, 19357831466 + ... + 19357838643.

It is an arithmetic number, because the mean of its divisors is an integer number (18022144436205).

Almost surely, 2^{138950540021201} is an apocalyptic number.

It is an amenable number.

138950540021201 is a deficient number, since it is larger than the sum of its proper divisors (5226615468439).

138950540021201 is an equidigital number, since it uses as much as digits as its factorization.

138950540021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38715670243.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 138950540021201 in words is "one hundred thirty-eight trillion, nine hundred fifty billion, five hundred forty million, twenty-one thousand, two hundred one".