1311112220389 has 2 divisors, whose sum is σ = 1311112220390. Its totient is φ = 1311112220388.

The previous prime is 1311112220287. The next prime is 1311112220393. The reversal of 1311112220389 is 9830222111131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1066349500164 + 244762720225 = 1032642^2 + 494735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311112220389 - 2⁹ = 1311112219877 is a prime.

It is a super-2 number, since 2×1311112220389² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311112220189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655556110194 + 655556110195.

It is an arithmetic number, because the mean of its divisors is an integer number (655556110195).

Almost surely, 2^{1311112220389} is an apocalyptic number.

It is an amenable number.

1311112220389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311112220389 is an equidigital number, since it uses as much as digits as its factorization.

1311112220389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 1311112220389 in words is "one trillion, three hundred eleven billion, one hundred twelve million, two hundred twenty thousand, three hundred eighty-nine".