311121132211 has 4 divisors (see below), whose sum is σ = 316394371800. Its totient is φ = 305847892624.

The previous prime is 311121132193. The next prime is 311121132247. The reversal of 311121132211 is 112231121113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112231121113 = 71153 ⋅1577321.

It is a cyclic number.

It is not a de Polignac number, because 311121132211 - 2⁷ = 311121132083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311121132281) 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, 2636619706 + ... + 2636619823.

It is an arithmetic number, because the mean of its divisors is an integer number (79098592950).

Almost surely, 2^311121132211 is an apocalyptic number.

311121132211 is a deficient number, since it is larger than the sum of its proper divisors (5273239589).

311121132211 is an equidigital number, since it uses as much as digits as its factorization.

311121132211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273239588.

The product of its digits is 72, while the sum is 19.

Adding to 311121132211 its reverse (112231121113), we get a palindrome (423352253324).

The spelling of 311121132211 in words is "three hundred eleven billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred eleven".