1221203045089 has 2 divisors, whose sum is σ = 1221203045090. Its totient is φ = 1221203045088.

The previous prime is 1221203045053. The next prime is 1221203045141. The reversal of 1221203045089 is 9805403021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155055320225 + 66147724864 = 1074735^2 + 257192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221203045089 - 2¹⁹ = 1221202520801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221203045039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610601522544 + 610601522545.

It is an arithmetic number, because the mean of its divisors is an integer number (610601522545).

Almost surely, 2^{1221203045089} is an apocalyptic number.

It is an amenable number.

1221203045089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221203045089 is an equidigital number, since it uses as much as digits as its factorization.

1221203045089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 1221203045089 in words is "one trillion, two hundred twenty-one billion, two hundred three million, forty-five thousand, eighty-nine".