2111532123 has 4 divisors (see below), whose sum is σ = 2815376168. Its totient is φ = 1407688080.

The previous prime is 2111532121. The next prime is 2111532127. The reversal of 2111532123 is 3212351112.

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

It is not a de Polignac number, because 2111532123 - 2¹ = 2111532121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111532123.

It is not an unprimeable number, because it can be changed into a prime (2111532121) 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, 351922018 + ... + 351922023.

It is an arithmetic number, because the mean of its divisors is an integer number (703844042).

Almost surely, 2^2111532123 is an apocalyptic number.

2111532123 is a deficient number, since it is larger than the sum of its proper divisors (703844045).

2111532123 is an equidigital number, since it uses as much as digits as its factorization.

2111532123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703844044.

The product of its digits is 360, while the sum is 21.

The square root of 2111532123 is about 45951.4104571340. The cubic root of 2111532123 is about 1282.9189818485.

Adding to 2111532123 its reverse (3212351112), we get a palindrome (5323883235).

The spelling of 2111532123 in words is "two billion, one hundred eleven million, five hundred thirty-two thousand, one hundred twenty-three".