1230123134021 has 2 divisors, whose sum is σ = 1230123134022. Its totient is φ = 1230123134020.

The previous prime is 1230123133997. The next prime is 1230123134041. The reversal of 1230123134021 is 1204313210321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1156885243396 + 73237890625 = 1075586^2 + 270625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230123134021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230123134041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615061567010 + 615061567011.

It is an arithmetic number, because the mean of its divisors is an integer number (615061567011).

Almost surely, 2^{1230123134021} is an apocalyptic number.

It is an amenable number.

1230123134021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230123134021 is an equidigital number, since it uses as much as digits as its factorization.

1230123134021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1230123134021 its reverse (1204313210321), we get a palindrome (2434436344342).

The spelling of 1230123134021 in words is "one trillion, two hundred thirty billion, one hundred twenty-three million, one hundred thirty-four thousand, twenty-one".