1331123113211 has 2 divisors, whose sum is σ = 1331123113212. Its totient is φ = 1331123113210.

The previous prime is 1331123113193. The next prime is 1331123113247. The reversal of 1331123113211 is 1123113211331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331123113211 - 2³⁴ = 1313943244027 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331123113811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665561556605 + 665561556606.

It is an arithmetic number, because the mean of its divisors is an integer number (665561556606).

Almost surely, 2^{1331123113211} is an apocalyptic number.

1331123113211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331123113211 is an equidigital number, since it uses as much as digits as its factorization.

1331123113211 is an evil number, because the sum of its binary digits is even.

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

Adding to 1331123113211 its reverse (1123113211331), we get a palindrome (2454236324542).

The spelling of 1331123113211 in words is "one trillion, three hundred thirty-one billion, one hundred twenty-three million, one hundred thirteen thousand, two hundred eleven".