1313101261 has 2 divisors, whose sum is σ = 1313101262. Its totient is φ = 1313101260.

The previous prime is 1313101259. The next prime is 1313101327. The reversal of 1313101261 is 1621013131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129363236 + 183738025 = 33606^2 + 13555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313101261 - 2¹ = 1313101259 is a prime.

It is a super-3 number, since 3×1313101261³ (a number of 28 digits) contains 333 as substring.

Together with 1313101259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313101861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656550630 + 656550631.

It is an arithmetic number, because the mean of its divisors is an integer number (656550631).

Almost surely, 2^1313101261 is an apocalyptic number.

It is an amenable number.

1313101261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313101261 is an equidigital number, since it uses as much as digits as its factorization.

1313101261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1313101261 is about 36236.7391054990. The cubic root of 1313101261 is about 1095.0469489124.

Adding to 1313101261 its reverse (1621013131), we get a palindrome (2934114392).

The spelling of 1313101261 in words is "one billion, three hundred thirteen million, one hundred one thousand, two hundred sixty-one".