2311111113221 has 8 divisors (see below), whose sum is σ = 2313591757344. Its totient is φ = 2308631040720.

The previous prime is 2311111113211. The next prime is 2311111113293. The reversal of 2311111113221 is 1223111111132.

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-2311111113221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311111113193 and 2311111113202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311111113211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8208446 + ... + 8485328.

It is an arithmetic number, because the mean of its divisors is an integer number (289198969668).

Almost surely, 2^{2311111113221} is an apocalyptic number.

It is an amenable number.

2311111113221 is a deficient number, since it is larger than the sum of its proper divisors (2480644123).

2311111113221 is a wasteful number, since it uses less digits than its factorization.

2311111113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285811.

The product of its digits is 72, while the sum is 20.

Adding to 2311111113221 its reverse (1223111111132), we get a palindrome (3534222224353).

The spelling of 2311111113221 in words is "two trillion, three hundred eleven billion, one hundred eleven million, one hundred thirteen thousand, two hundred twenty-one".