1211332340423 has 2 divisors, whose sum is σ = 1211332340424. Its totient is φ = 1211332340422.

The previous prime is 1211332340419. The next prime is 1211332340447. The reversal of 1211332340423 is 3240432331121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211332340423 - 2² = 1211332340419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211332340453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605666170211 + 605666170212.

It is an arithmetic number, because the mean of its divisors is an integer number (605666170212).

Almost surely, 2^{1211332340423} is an apocalyptic number.

1211332340423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211332340423 is an equidigital number, since it uses as much as digits as its factorization.

1211332340423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1211332340423 its reverse (3240432331121), we get a palindrome (4451764671544).

The spelling of 1211332340423 in words is "one trillion, two hundred eleven billion, three hundred thirty-two million, three hundred forty thousand, four hundred twenty-three".