5132123421521 has 2 divisors, whose sum is σ = 5132123421522. Its totient is φ = 5132123421520.

The previous prime is 5132123421517. The next prime is 5132123421559. The reversal of 5132123421521 is 1251243212315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4989129780496 + 142993641025 = 2233636^2 + 378145^2 .

It is a cyclic number.

It is not a de Polignac number, because 5132123421521 - 2² = 5132123421517 is a prime.

It is not a weakly prime, because it can be changed into another prime (5132123420521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2566061710760 + 2566061710761.

It is an arithmetic number, because the mean of its divisors is an integer number (2566061710761).

Almost surely, 2^{5132123421521} is an apocalyptic number.

It is an amenable number.

5132123421521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5132123421521 is an equidigital number, since it uses as much as digits as its factorization.

5132123421521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

Adding to 5132123421521 its reverse (1251243212315), we get a palindrome (6383366633836).

The spelling of 5132123421521 in words is "five trillion, one hundred thirty-two billion, one hundred twenty-three million, four hundred twenty-one thousand, five hundred twenty-one".