2681140123 has 4 divisors (see below), whose sum is σ = 2681255808. Its totient is φ = 2681024440.

The previous prime is 2681140081. The next prime is 2681140151. The reversal of 2681140123 is 3210411862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2681140123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2681140091 and 2681140100.

It is not an unprimeable number, because it can be changed into a prime (2681140723) 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, 9748 + ... + 73873.

It is an arithmetic number, because the mean of its divisors is an integer number (670313952).

Almost surely, 2^2681140123 is an apocalyptic number.

2681140123 is a deficient number, since it is larger than the sum of its proper divisors (115685).

2681140123 is an equidigital number, since it uses as much as digits as its factorization.

2681140123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115684.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2681140123 is about 51779.7269498401. The cubic root of 2681140123 is about 1389.2268569335.

Adding to 2681140123 its reverse (3210411862), we get a palindrome (5891551985).

The spelling of 2681140123 in words is "two billion, six hundred eighty-one million, one hundred forty thousand, one hundred twenty-three".