1351103724521 has 2 divisors, whose sum is σ = 1351103724522. Its totient is φ = 1351103724520.

The previous prime is 1351103724437. The next prime is 1351103724563. The reversal of 1351103724521 is 1254273011531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 926475551296 + 424628173225 = 962536^2 + 651635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1351103724521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1351103724571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675551862260 + 675551862261.

It is an arithmetic number, because the mean of its divisors is an integer number (675551862261).

Almost surely, 2^{1351103724521} is an apocalyptic number.

It is an amenable number.

1351103724521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351103724521 is an equidigital number, since it uses as much as digits as its factorization.

1351103724521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 1351103724521 in words is "one trillion, three hundred fifty-one billion, one hundred three million, seven hundred twenty-four thousand, five hundred twenty-one".