1331421104009 has 2 divisors, whose sum is σ = 1331421104010. Its totient is φ = 1331421104008.

The previous prime is 1331421103967. The next prime is 1331421104029. The reversal of 1331421104009 is 9004011241331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1282680828025 + 48740275984 = 1132555^2 + 220772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331421104009 - 2²⁴ = 1331404326793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331421104029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665710552004 + 665710552005.

It is an arithmetic number, because the mean of its divisors is an integer number (665710552005).

Almost surely, 2^{1331421104009} is an apocalyptic number.

It is an amenable number.

1331421104009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331421104009 is an equidigital number, since it uses as much as digits as its factorization.

1331421104009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 1331421104009 in words is "one trillion, three hundred thirty-one billion, four hundred twenty-one million, one hundred four thousand, nine".