1331323311321 has 12 divisors (see below), whose sum is σ = 1935757811520. Its totient is φ = 881671066200.

The previous prime is 1331323311319. The next prime is 1331323311341. The reversal of 1331323311321 is 1231133231331.

1331323311321 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 3 + 2 + 331 + 1 + 321 = 666.

It is not a de Polignac number, because 1331323311321 - 2¹ = 1331323311319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331323311341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489815901 + ... + 489818618.

It is an arithmetic number, because the mean of its divisors is an integer number (161313150960).

Almost surely, 2^{1331323311321} is an apocalyptic number.

It is an amenable number.

1331323311321 is a deficient number, since it is larger than the sum of its proper divisors (604434500199).

1331323311321 is a wasteful number, since it uses less digits than its factorization.

1331323311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979634676 (or 979634673 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

Adding to 1331323311321 its reverse (1231133231331), we get a palindrome (2562456542652).

The spelling of 1331323311321 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-three million, three hundred eleven thousand, three hundred twenty-one".