1338111113381 has 6 divisors (see below), whose sum is σ = 1556578233990. Its totient is φ = 1146952382856.

The previous prime is 1338111113377. The next prime is 1338111113393. The reversal of 1338111113381 is 1833111118331.

It can be written as a sum of positive squares in only one way, i.e., 1193304988225 + 144806125156 = 1092385^2 + 380534^2 .

It is not a de Polignac number, because 1338111113381 - 2² = 1338111113377 is a prime.

It is a super-2 number, since 2×1338111113381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338111113321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13654194986 + ... + 13654195083.

It is an arithmetic number, because the mean of its divisors is an integer number (259429705665).

Almost surely, 2^{1338111113381} is an apocalyptic number.

It is an amenable number.

1338111113381 is a deficient number, since it is larger than the sum of its proper divisors (218467120609).

1338111113381 is an equidigital number, since it uses as much as digits as its factorization.

1338111113381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27308390083 (or 27308390076 counting only the distinct ones).

The product of its digits is 5184, while the sum is 35.

The spelling of 1338111113381 in words is "one trillion, three hundred thirty-eight billion, one hundred eleven million, one hundred thirteen thousand, three hundred eighty-one".