1203310000261 has 2 divisors, whose sum is σ = 1203310000262. Its totient is φ = 1203310000260.

The previous prime is 1203310000177. The next prime is 1203310000307. The reversal of 1203310000261 is 1620000133021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897246567361 + 306063432900 = 947231^2 + 553230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203310000261 - 2⁷ = 1203310000133 is a prime.

It is a super-3 number, since 3×1203310000261³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203313000261) 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, 601655000130 + 601655000131.

It is an arithmetic number, because the mean of its divisors is an integer number (601655000131).

Almost surely, 2^{1203310000261} is an apocalyptic number.

It is an amenable number.

1203310000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203310000261 is an equidigital number, since it uses as much as digits as its factorization.

1203310000261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1203310000261 its reverse (1620000133021), we get a palindrome (2823310133282).

The spelling of 1203310000261 in words is "one trillion, two hundred three billion, three hundred ten million, two hundred sixty-one", and thus it is an aban number.