1712124251521 has 2 divisors, whose sum is σ = 1712124251522. Its totient is φ = 1712124251520.

The previous prime is 1712124251507. The next prime is 1712124251543. The reversal of 1712124251521 is 1251524212171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1332777891600 + 379346359921 = 1154460^2 + 615911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1712124251521 - 2⁵ = 1712124251489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1712124251921) 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, 856062125760 + 856062125761.

It is an arithmetic number, because the mean of its divisors is an integer number (856062125761).

Almost surely, 2^{1712124251521} is an apocalyptic number.

It is an amenable number.

1712124251521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1712124251521 is an equidigital number, since it uses as much as digits as its factorization.

1712124251521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 34.

Adding to 1712124251521 its reverse (1251524212171), we get a palindrome (2963648463692).

The spelling of 1712124251521 in words is "one trillion, seven hundred twelve billion, one hundred twenty-four million, two hundred fifty-one thousand, five hundred twenty-one".