13123634003021 has 2 divisors, whose sum is σ = 13123634003022. Its totient is φ = 13123634003020.

The previous prime is 13123634003003. The next prime is 13123634003101. The reversal of 13123634003021 is 12030043632131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8632989858025 + 4490644144996 = 2938195^2 + 2119114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13123634003021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13123634003321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561817001510 + 6561817001511.

It is an arithmetic number, because the mean of its divisors is an integer number (6561817001511).

Almost surely, 2^{13123634003021} is an apocalyptic number.

It is an amenable number.

13123634003021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13123634003021 is an equidigital number, since it uses as much as digits as its factorization.

13123634003021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 13123634003021 its reverse (12030043632131), we get a palindrome (25153677635152).

The spelling of 13123634003021 in words is "thirteen trillion, one hundred twenty-three billion, six hundred thirty-four million, three thousand, twenty-one".