1316133161261 has 4 divisors (see below), whose sum is σ = 1317760026300. Its totient is φ = 1314506296224.

The previous prime is 1316133161177. The next prime is 1316133161267. The reversal of 1316133161261 is 1621613316131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 498725502025 + 817407659236 = 706205^2 + 904106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316133161261 is a prime.

It is a super-2 number, since 2×1316133161261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316133161267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813431306 + ... + 813432923.

It is an arithmetic number, because the mean of its divisors is an integer number (329440006575).

Almost surely, 2^{1316133161261} is an apocalyptic number.

It is an amenable number.

1316133161261 is a deficient number, since it is larger than the sum of its proper divisors (1626865039).

1316133161261 is an equidigital number, since it uses as much as digits as its factorization.

1316133161261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626865038.

The product of its digits is 11664, while the sum is 35.

Adding to 1316133161261 its reverse (1621613316131), we get a palindrome (2937746477392).

The spelling of 1316133161261 in words is "one trillion, three hundred sixteen billion, one hundred thirty-three million, one hundred sixty-one thousand, two hundred sixty-one".