2111312444231 has 4 divisors (see below), whose sum is σ = 2111665453464. Its totient is φ = 2110959435000.

The previous prime is 2111312444207. The next prime is 2111312444251. The reversal of 2111312444231 is 1324442131112.

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-2111312444231 is a prime.

It is a super-2 number, since 2×2111312444231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111312444194 and 2111312444203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111312444201) 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, 176495645 + ... + 176507606.

It is an arithmetic number, because the mean of its divisors is an integer number (527916363366).

Almost surely, 2^{2111312444231} is an apocalyptic number.

2111312444231 is a deficient number, since it is larger than the sum of its proper divisors (353009233).

2111312444231 is an equidigital number, since it uses as much as digits as its factorization.

2111312444231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353009232.

The product of its digits is 4608, while the sum is 29.

Adding to 2111312444231 its reverse (1324442131112), we get a palindrome (3435754575343).

The spelling of 2111312444231 in words is "two trillion, one hundred eleven billion, three hundred twelve million, four hundred forty-four thousand, two hundred thirty-one".