3111230232221 has 4 divisors (see below), whose sum is σ = 3183584423712. Its totient is φ = 3038876040732.

The previous prime is 3111230232211. The next prime is 3111230232223. The reversal of 3111230232221 is 1222320321113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111230232221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111230232223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36177095681 + ... + 36177095766.

It is an arithmetic number, because the mean of its divisors is an integer number (795896105928).

Almost surely, 2^{3111230232221} is an apocalyptic number.

It is an amenable number.

3111230232221 is a deficient number, since it is larger than the sum of its proper divisors (72354191491).

3111230232221 is an equidigital number, since it uses as much as digits as its factorization.

3111230232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72354191490.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 3111230232221 its reverse (1222320321113), we get a palindrome (4333550553334).

The spelling of 3111230232221 in words is "three trillion, one hundred eleven billion, two hundred thirty million, two hundred thirty-two thousand, two hundred twenty-one".