1339378211081 has 8 divisors (see below), whose sum is σ = 1421323669800. Its totient is φ = 1257783697408.

The previous prime is 1339378211063. The next prime is 1339378211117. The reversal of 1339378211081 is 1801128739331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 87799023481 + 1251579187600 = 296309^2 + 1118740^2 .

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 1339378211081 - 2³⁴ = 1322198341897 is a prime.

It is a super-3 number, since 3×1339378211081³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1339378211681) 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, 87728396 + ... + 87743661.

It is an arithmetic number, because the mean of its divisors is an integer number (177665458725).

Almost surely, 2^{1339378211081} is an apocalyptic number.

It is an amenable number.

1339378211081 is a deficient number, since it is larger than the sum of its proper divisors (81945458719).

1339378211081 is a wasteful number, since it uses less digits than its factorization.

1339378211081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175472523.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 1339378211081 in words is "one trillion, three hundred thirty-nine billion, three hundred seventy-eight million, two hundred eleven thousand, eighty-one".