1231204324411 has 2 divisors, whose sum is σ = 1231204324412. Its totient is φ = 1231204324410.

The previous prime is 1231204324409. The next prime is 1231204324417. The reversal of 1231204324411 is 1144234021321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231204324411 - 2¹ = 1231204324409 is a prime.

Together with 1231204324409, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1231204324411.

It is not a weakly prime, because it can be changed into another prime (1231204324417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615602162205 + 615602162206.

It is an arithmetic number, because the mean of its divisors is an integer number (615602162206).

Almost surely, 2^{1231204324411} is an apocalyptic number.

1231204324411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231204324411 is an equidigital number, since it uses as much as digits as its factorization.

1231204324411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 1231204324411 its reverse (1144234021321), we get a palindrome (2375438345732).

The spelling of 1231204324411 in words is "one trillion, two hundred thirty-one billion, two hundred four million, three hundred twenty-four thousand, four hundred eleven".