1238335328421 has 16 divisors (see below), whose sum is σ = 1942486790400. Its totient is φ = 776994715584.

The previous prime is 1238335328359. The next prime is 1238335328437. The reversal of 1238335328421 is 1248235338321.

It is a happy number.

1238335328421 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 33 + 532 + 84 + 2 + 1 = 666.

It is not a de Polignac number, because 1238335328421 - 2⁹ = 1238335327909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238335320421) 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, 1348948701 + ... + 1348949618.

It is an arithmetic number, because the mean of its divisors is an integer number (121405424400).

Almost surely, 2^{1238335328421} is an apocalyptic number.

It is an amenable number.

1238335328421 is a deficient number, since it is larger than the sum of its proper divisors (704151461979).

1238335328421 is a wasteful number, since it uses less digits than its factorization.

1238335328421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697898345 (or 2697898339 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 1238335328421 in words is "one trillion, two hundred thirty-eight billion, three hundred thirty-five million, three hundred twenty-eight thousand, four hundred twenty-one".