381372506195321 has 2 divisors, whose sum is σ = 381372506195322. Its totient is φ = 381372506195320.

The previous prime is 381372506195257. The next prime is 381372506195327. The reversal of 381372506195321 is 123591605273183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292379904774400 + 88992601420921 = 17099120^2 + 9433589^2 .

It is an emirp because it is prime and its reverse (123591605273183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381372506195321 - 2⁶ = 381372506195257 is a prime.

It is not a weakly prime, because it can be changed into another prime (381372506195327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190686253097660 + 190686253097661.

It is an arithmetic number, because the mean of its divisors is an integer number (190686253097661).

Almost surely, 2^{381372506195321} is an apocalyptic number.

It is an amenable number.

381372506195321 is a deficient number, since it is larger than the sum of its proper divisors (1).

381372506195321 is an equidigital number, since it uses as much as digits as its factorization.

381372506195321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 381372506195321 in words is "three hundred eighty-one trillion, three hundred seventy-two billion, five hundred six million, one hundred ninety-five thousand, three hundred twenty-one".