1331331219973 has 2 divisors, whose sum is σ = 1331331219974. Its totient is φ = 1331331219972.

The previous prime is 1331331219913. The next prime is 1331331220013. The reversal of 1331331219973 is 3799121331331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1266113297089 + 65217922884 = 1125217^2 + 255378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331331219973 - 2⁹ = 1331331219461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331331219913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665665609986 + 665665609987.

It is an arithmetic number, because the mean of its divisors is an integer number (665665609987).

Almost surely, 2^{1331331219973} is an apocalyptic number.

It is an amenable number.

1331331219973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331331219973 is an equidigital number, since it uses as much as digits as its factorization.

1331331219973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 275562, while the sum is 46.

The spelling of 1331331219973 in words is "one trillion, three hundred thirty-one billion, three hundred thirty-one million, two hundred nineteen thousand, nine hundred seventy-three".