1285102218461 has 2 divisors, whose sum is σ = 1285102218462. Its totient is φ = 1285102218460.

The previous prime is 1285102218383. The next prime is 1285102218503. The reversal of 1285102218461 is 1648122015821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692365447225 + 592736771236 = 832085^2 + 769894^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285102218461 - 2¹⁸ = 1285101956317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285102218761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642551109230 + 642551109231.

It is an arithmetic number, because the mean of its divisors is an integer number (642551109231).

Almost surely, 2^{1285102218461} is an apocalyptic number.

It is an amenable number.

1285102218461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285102218461 is an equidigital number, since it uses as much as digits as its factorization.

1285102218461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61440, while the sum is 41.

The spelling of 1285102218461 in words is "one trillion, two hundred eighty-five billion, one hundred two million, two hundred eighteen thousand, four hundred sixty-one".