2111356723 has 4 divisors (see below), whose sum is σ = 2412979120. Its totient is φ = 1809734328.

The previous prime is 2111356721. The next prime is 2111356733. The reversal of 2111356723 is 3276531112.

It is a happy number.

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 2111356723 - 2¹ = 2111356721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111356721) 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, 150811188 + ... + 150811201.

It is an arithmetic number, because the mean of its divisors is an integer number (603244780).

Almost surely, 2^2111356723 is an apocalyptic number.

2111356723 is a deficient number, since it is larger than the sum of its proper divisors (301622397).

2111356723 is an equidigital number, since it uses as much as digits as its factorization.

2111356723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301622396.

The product of its digits is 7560, while the sum is 31.

The square root of 2111356723 is about 45949.5018797810. The cubic root of 2111356723 is about 1282.8834578455.

Adding to 2111356723 its reverse (3276531112), we get a palindrome (5387887835).

The spelling of 2111356723 in words is "two billion, one hundred eleven million, three hundred fifty-six thousand, seven hundred twenty-three".