311121302231 has 8 divisors (see below), whose sum is σ = 315507154800. Its totient is φ = 306738798912.

The previous prime is 311121302213. The next prime is 311121302251. The reversal of 311121302231 is 132203121113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311121302231 is a prime.

It is a super-2 number, since 2×311121302231² (a number of 24 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 (311121302251) 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 7 ways as a sum of consecutive naturals, for example, 649925 + ... + 1022078.

It is an arithmetic number, because the mean of its divisors is an integer number (39438394350).

Almost surely, 2^311121302231 is an apocalyptic number.

311121302231 is a deficient number, since it is larger than the sum of its proper divisors (4385852569).

311121302231 is a wasteful number, since it uses less digits than its factorization.

311121302231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674625.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311121302231 its reverse (132203121113), we get a palindrome (443324423344).

The spelling of 311121302231 in words is "three hundred eleven billion, one hundred twenty-one million, three hundred two thousand, two hundred thirty-one".