1311161361115 has 16 divisors (see below), whose sum is σ = 1574461511136. Its totient is φ = 1048217414400.

The previous prime is 1311161361101. The next prime is 1311161361121. The reversal of 1311161361115 is 5111631611131.

It is not a de Polignac number, because 1311161361115 - 2³¹ = 1309013877467 is a prime.

It is a super-2 number, since 2×1311161361115² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56090380 + ... + 56113750.

It is an arithmetic number, because the mean of its divisors is an integer number (98403844446).

Almost surely, 2^{1311161361115} is an apocalyptic number.

1311161361115 is a deficient number, since it is larger than the sum of its proper divisors (263300150021).

1311161361115 is a wasteful number, since it uses less digits than its factorization.

1311161361115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30510.

The product of its digits is 1620, while the sum is 31.

Adding to 1311161361115 its reverse (5111631611131), we get a palindrome (6422792972246).

The spelling of 1311161361115 in words is "one trillion, three hundred eleven billion, one hundred sixty-one million, three hundred sixty-one thousand, one hundred fifteen".