2111321104523 has 4 divisors (see below), whose sum is σ = 2111378873208. Its totient is φ = 2111263335840.

The previous prime is 2111321104511. The next prime is 2111321104531. The reversal of 2111321104523 is 3254011231112.

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

It is a cyclic number.

It is not a de Polignac number, because 2111321104523 - 2⁴ = 2111321104507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111321104492 and 2111321104501.

It is not an unprimeable number, because it can be changed into a prime (2111321104223) 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, 28829486 + ... + 28902627.

It is an arithmetic number, because the mean of its divisors is an integer number (527844718302).

Almost surely, 2^{2111321104523} is an apocalyptic number.

2111321104523 is a deficient number, since it is larger than the sum of its proper divisors (57768685).

2111321104523 is an equidigital number, since it uses as much as digits as its factorization.

2111321104523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57768684.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 2111321104523 its reverse (3254011231112), we get a palindrome (5365332335635).

The spelling of 2111321104523 in words is "two trillion, one hundred eleven billion, three hundred twenty-one million, one hundred four thousand, five hundred twenty-three".