1311105151 has 4 divisors (see below), whose sum is σ = 1311185304. Its totient is φ = 1311025000.

The previous prime is 1311105137. The next prime is 1311105181. The reversal of 1311105151 is 1515011131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(1311105151) divides (1311105151-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1311105151 - 2¹³ = 1311096959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311105181) 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 in 3 ways as a sum of consecutive naturals, for example, 5725 + ... + 51526.

It is an arithmetic number, because the mean of its divisors is an integer number (327796326).

Almost surely, 2^1311105151 is an apocalyptic number.

1311105151 is the 22901-st heptagonal number.

1311105151 is a deficient number, since it is larger than the sum of its proper divisors (80153).

1311105151 is an equidigital number, since it uses as much as digits as its factorization.

1311105151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80152.

The product of its (nonzero) digits is 75, while the sum is 19.

The square root of 1311105151 is about 36209.1860030021. The cubic root of 1311105151 is about 1094.4917892141.

Adding to 1311105151 its reverse (1515011131), we get a palindrome (2826116282).

The spelling of 1311105151 in words is "one billion, three hundred eleven million, one hundred five thousand, one hundred fifty-one".