1221310200841 has 2 divisors, whose sum is σ = 1221310200842. Its totient is φ = 1221310200840.

The previous prime is 1221310200821. The next prime is 1221310200931. The reversal of 1221310200841 is 1480020131221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014129561600 + 207180639241 = 1007040^2 + 455171^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221310200841 - 2⁷ = 1221310200713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221310200811) 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, 610655100420 + 610655100421.

It is an arithmetic number, because the mean of its divisors is an integer number (610655100421).

Almost surely, 2^{1221310200841} is an apocalyptic number.

It is an amenable number.

1221310200841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221310200841 is an equidigital number, since it uses as much as digits as its factorization.

1221310200841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 1221310200841 in words is "one trillion, two hundred twenty-one billion, three hundred ten million, two hundred thousand, eight hundred forty-one".