1331243203309 has 16 divisors (see below), whose sum is σ = 1406805368320. Its totient is φ = 1257747886080.

The previous prime is 1331243203259. The next prime is 1331243203313. The reversal of 1331243203309 is 9033023421331.

It is a cyclic number.

It is not a de Polignac number, because 1331243203309 - 2²⁷ = 1331108985581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331243203349) 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, 2614957 + ... + 3082285.

It is an arithmetic number, because the mean of its divisors is an integer number (87925335520).

Almost surely, 2^{1331243203309} is an apocalyptic number.

It is an amenable number.

1331243203309 is a deficient number, since it is larger than the sum of its proper divisors (75562165011).

1331243203309 is a wasteful number, since it uses less digits than its factorization.

1331243203309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469540.

The product of its (nonzero) digits is 34992, while the sum is 34.

The spelling of 1331243203309 in words is "one trillion, three hundred thirty-one billion, two hundred forty-three million, two hundred three thousand, three hundred nine".