1231211231023 has 2 divisors, whose sum is σ = 1231211231024. Its totient is φ = 1231211231022.

The previous prime is 1231211230993. The next prime is 1231211231027. The reversal of 1231211231023 is 3201321121321.

It is a strong prime.

It is an emirp because it is prime and its reverse (3201321121321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231211231023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231211230985 and 1231211231003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231211231027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615605615511 + 615605615512.

It is an arithmetic number, because the mean of its divisors is an integer number (615605615512).

Almost surely, 2^{1231211231023} is an apocalyptic number.

1231211231023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231211231023 is an equidigital number, since it uses as much as digits as its factorization.

1231211231023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1231211231023 its reverse (3201321121321), we get a palindrome (4432532352344).

The spelling of 1231211231023 in words is "one trillion, two hundred thirty-one billion, two hundred eleven million, two hundred thirty-one thousand, twenty-three".