1338994119981 has 16 divisors (see below), whose sum is σ = 2040491908224. Its totient is φ = 765094528704.

The previous prime is 1338994119971. The next prime is 1338994120033. The reversal of 1338994119981 is 1899114998331.

It is a happy number.

It is not a de Polignac number, because 1338994119981 - 2³⁹ = 789238306093 is a prime.

It is a super-2 number, since 2×1338994119981² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338994119961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1506186 + ... + 2224091.

It is an arithmetic number, because the mean of its divisors is an integer number (127530744264).

Almost surely, 2^{1338994119981} is an apocalyptic number.

It is an amenable number.

1338994119981 is a deficient number, since it is larger than the sum of its proper divisors (701497788243).

1338994119981 is a wasteful number, since it uses less digits than its factorization.

1338994119981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747380.

The product of its digits is 15116544, while the sum is 66.

The spelling of 1338994119981 in words is "one trillion, three hundred thirty-eight billion, nine hundred ninety-four million, one hundred nineteen thousand, nine hundred eighty-one".