2123123735 has 4 divisors (see below), whose sum is σ = 2547748488. Its totient is φ = 1698498984.

The previous prime is 2123123731. The next prime is 2123123801. The reversal of 2123123735 is 5373213212.

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 2123123735 - 2² = 2123123731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123123698 and 2123123707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123123731) 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, 212312369 + ... + 212312378.

It is an arithmetic number, because the mean of its divisors is an integer number (636937122).

Almost surely, 2^2123123735 is an apocalyptic number.

2123123735 is a deficient number, since it is larger than the sum of its proper divisors (424624753).

2123123735 is an equidigital number, since it uses as much as digits as its factorization.

2123123735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424624752.

The product of its digits is 7560, while the sum is 29.

The square root of 2123123735 is about 46077.3668409991. The cubic root of 2123123735 is about 1285.2622991526.

Adding to 2123123735 its reverse (5373213212), we get a palindrome (7496336947).

The spelling of 2123123735 in words is "two billion, one hundred twenty-three million, one hundred twenty-three thousand, seven hundred thirty-five".