4281851367721 has 2 divisors, whose sum is σ = 4281851367722. Its totient is φ = 4281851367720.

The previous prime is 4281851367707. The next prime is 4281851367749. The reversal of 4281851367721 is 1277631581824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4196741474025 + 85109893696 = 2048595^2 + 291736^2 .

It is a cyclic number.

It is not a de Polignac number, because 4281851367721 - 2⁷ = 4281851367593 is a prime.

It is a super-2 number, since 2×4281851367721² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4281851367121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2140925683860 + 2140925683861.

It is an arithmetic number, because the mean of its divisors is an integer number (2140925683861).

Almost surely, 2^{4281851367721} is an apocalyptic number.

It is an amenable number.

4281851367721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4281851367721 is an equidigital number, since it uses as much as digits as its factorization.

4281851367721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 55.

The spelling of 4281851367721 in words is "four trillion, two hundred eighty-one billion, eight hundred fifty-one million, three hundred sixty-seven thousand, seven hundred twenty-one".