1331121231013 has 16 divisors (see below), whose sum is σ = 1598077958400. Its totient is φ = 1084029509376.

The previous prime is 1331121231007. The next prime is 1331121231043. The reversal of 1331121231013 is 3101321211331.

It is a cyclic number.

It is not a de Polignac number, because 1331121231013 - 2⁵ = 1331121230981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331121231043) 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, 27720420 + ... + 27768397.

It is an arithmetic number, because the mean of its divisors is an integer number (99879872400).

Almost surely, 2^{1331121231013} is an apocalyptic number.

It is an amenable number.

1331121231013 is a deficient number, since it is larger than the sum of its proper divisors (266956727387).

1331121231013 is a wasteful number, since it uses less digits than its factorization.

1331121231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55488996.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1331121231013 its reverse (3101321211331), we get a palindrome (4432442442344).

The spelling of 1331121231013 in words is "one trillion, three hundred thirty-one billion, one hundred twenty-one million, two hundred thirty-one thousand, thirteen".