1211331123839 has 2 divisors, whose sum is σ = 1211331123840. Its totient is φ = 1211331123838.

The previous prime is 1211331123829. The next prime is 1211331123887. The reversal of 1211331123839 is 9383211331121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211331123839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211331123829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605665561919 + 605665561920.

It is an arithmetic number, because the mean of its divisors is an integer number (605665561920).

Almost surely, 2^{1211331123839} is an apocalyptic number.

1211331123839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211331123839 is an equidigital number, since it uses as much as digits as its factorization.

1211331123839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The spelling of 1211331123839 in words is "one trillion, two hundred eleven billion, three hundred thirty-one million, one hundred twenty-three thousand, eight hundred thirty-nine".