1203013231261 has 2 divisors, whose sum is σ = 1203013231262. Its totient is φ = 1203013231260.

The previous prime is 1203013231223. The next prime is 1203013231319. The reversal of 1203013231261 is 1621323103021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1080572724036 + 122440507225 = 1039506^2 + 349915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203013231261 - 2¹¹ = 1203013229213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203013231061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601506615630 + 601506615631.

It is an arithmetic number, because the mean of its divisors is an integer number (601506615631).

Almost surely, 2^{1203013231261} is an apocalyptic number.

It is an amenable number.

1203013231261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203013231261 is an equidigital number, since it uses as much as digits as its factorization.

1203013231261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1203013231261 its reverse (1621323103021), we get a palindrome (2824336334282).

The spelling of 1203013231261 in words is "one trillion, two hundred three billion, thirteen million, two hundred thirty-one thousand, two hundred sixty-one".