1331323111121 has 12 divisors (see below), whose sum is σ = 1392008370480. Its totient is φ = 1273178751240.

The previous prime is 1331323111117. The next prime is 1331323111211. The reversal of 1331323111121 is 1211113231331.

It is not a de Polignac number, because 1331323111121 - 2² = 1331323111117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331323111021) 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, 2353310 + ... + 2863688.

It is an arithmetic number, because the mean of its divisors is an integer number (116000697540).

Almost surely, 2^{1331323111121} is an apocalyptic number.

It is an amenable number.

1331323111121 is a deficient number, since it is larger than the sum of its proper divisors (60685259359).

1331323111121 is an equidigital number, since it uses as much as digits as its factorization.

1331323111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515356 (or 515333 counting only the distinct ones).

The product of its digits is 324, while the sum is 23.

Adding to 1331323111121 its reverse (1211113231331), we get a palindrome (2542436342452).

The spelling of 1331323111121 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-three million, one hundred eleven thousand, one hundred twenty-one".