1220463560681 has 2 divisors, whose sum is σ = 1220463560682. Its totient is φ = 1220463560680.

The previous prime is 1220463560677. The next prime is 1220463560753. The reversal of 1220463560681 is 1860653640221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114111915225 + 106351645456 = 1055515^2 + 326116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220463560681 - 2² = 1220463560677 is a prime.

It is a super-2 number, since 2×1220463560681² (a number of 25 digits) contains 22 as substring.

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 (1220463560651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610231780340 + 610231780341.

It is an arithmetic number, because the mean of its divisors is an integer number (610231780341).

Almost surely, 2^{1220463560681} is an apocalyptic number.

It is an amenable number.

1220463560681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220463560681 is an equidigital number, since it uses as much as digits as its factorization.

1220463560681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 1220463560681 in words is "one trillion, two hundred twenty billion, four hundred sixty-three million, five hundred sixty thousand, six hundred eighty-one".