1331320211321 has 16 divisors (see below), whose sum is σ = 1428867711744. Its totient is φ = 1238294905344.

The previous prime is 1331320211209. The next prime is 1331320211381. The reversal of 1331320211321 is 1231120231331.

It is a cyclic number.

It is not a de Polignac number, because 1331320211321 - 2¹⁴ = 1331320194937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331320211381) 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, 8827160 + ... + 8976713.

It is an arithmetic number, because the mean of its divisors is an integer number (89304231984).

Almost surely, 2^{1331320211321} is an apocalyptic number.

It is an amenable number.

1331320211321 is a deficient number, since it is larger than the sum of its proper divisors (97547500423).

1331320211321 is a wasteful number, since it uses less digits than its factorization.

1331320211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17804000.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1331320211321 its reverse (1231120231331), we get a palindrome (2562440442652).

The spelling of 1331320211321 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, two hundred eleven thousand, three hundred twenty-one".