2111113220231 has 4 divisors (see below), whose sum is σ = 2115520555200. Its totient is φ = 2106705885264.

The previous prime is 2111113220219. The next prime is 2111113220239. The reversal of 2111113220231 is 1320223111112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111113220231 is a prime.

It is a super-2 number, since 2×2111113220231² (a number of 25 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 (2111113220239) 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 3 ways as a sum of consecutive naturals, for example, 2203666766 + ... + 2203667723.

It is an arithmetic number, because the mean of its divisors is an integer number (528880138800).

Almost surely, 2^{2111113220231} is an apocalyptic number.

2111113220231 is a deficient number, since it is larger than the sum of its proper divisors (4407334969).

2111113220231 is an equidigital number, since it uses as much as digits as its factorization.

2111113220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4407334968.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2111113220231 its reverse (1320223111112), we get a palindrome (3431336331343).

The spelling of 2111113220231 in words is "two trillion, one hundred eleven billion, one hundred thirteen million, two hundred twenty thousand, two hundred thirty-one".