1031301223261 has 2 divisors, whose sum is σ = 1031301223262. Its totient is φ = 1031301223260.

The previous prime is 1031301223207. The next prime is 1031301223313. The reversal of 1031301223261 is 1623221031301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 945378957636 + 85922265625 = 972306^2 + 293125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031301223261 - 2³¹ = 1029153739613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031701223261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515650611630 + 515650611631.

It is an arithmetic number, because the mean of its divisors is an integer number (515650611631).

Almost surely, 2^{1031301223261} is an apocalyptic number.

It is an amenable number.

1031301223261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031301223261 is an equidigital number, since it uses as much as digits as its factorization.

1031301223261 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 1031301223261 its reverse (1623221031301), we get a palindrome (2654522254562).

The spelling of 1031301223261 in words is "one trillion, thirty-one billion, three hundred one million, two hundred twenty-three thousand, two hundred sixty-one".