1331020202089 has 2 divisors, whose sum is σ = 1331020202090. Its totient is φ = 1331020202088.

The previous prime is 1331020202027. The next prime is 1331020202101. The reversal of 1331020202089 is 9802020201331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 929311424064 + 401708778025 = 964008^2 + 633805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331020202089 - 2⁷ = 1331020201961 is a prime.

It is a super-2 number, since 2×1331020202089² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331020202089.

It is not a weakly prime, because it can be changed into another prime (1331020202009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665510101044 + 665510101045.

It is an arithmetic number, because the mean of its divisors is an integer number (665510101045).

Almost surely, 2^{1331020202089} is an apocalyptic number.

It is an amenable number.

1331020202089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331020202089 is an equidigital number, since it uses as much as digits as its factorization.

1331020202089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 1331020202089 in words is "one trillion, three hundred thirty-one billion, twenty million, two hundred two thousand, eighty-nine".