5311111321 has 4 divisors (see below), whose sum is σ = 5623529652. Its totient is φ = 4998692992.

The previous prime is 5311111307. The next prime is 5311111381. The reversal of 5311111321 is 1231111135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1231111135 = 5 ⋅246222227.

It can be written as a sum of positive squares in 2 ways, for example, as 4337671321 + 973440000 = 65861^2 + 31200^2 .

It is a cyclic number.

It is not a de Polignac number, because 5311111321 - 2²³ = 5302722713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5311111381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156209140 + ... + 156209173.

It is an arithmetic number, because the mean of its divisors is an integer number (1405882413).

Almost surely, 2^5311111321 is an apocalyptic number.

It is an amenable number.

5311111321 is a deficient number, since it is larger than the sum of its proper divisors (312418331).

5311111321 is a wasteful number, since it uses less digits than its factorization.

5311111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312418330.

The product of its digits is 90, while the sum is 19.

The square root of 5311111321 is about 72877.3718035990. The cubic root of 5311111321 is about 1744.7309619354.

Adding to 5311111321 its reverse (1231111135), we get a palindrome (6542222456).

The spelling of 5311111321 in words is "five billion, three hundred eleven million, one hundred eleven thousand, three hundred twenty-one".