4123113721 has 4 divisors (see below), whose sum is σ = 4123610512. Its totient is φ = 4122616932.

The previous prime is 4123113713. The next prime is 4123113733. The reversal of 4123113721 is 1273113214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4123113721 - 2³ = 4123113713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4123113821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235731 + ... + 252616.

It is an arithmetic number, because the mean of its divisors is an integer number (1030902628).

Almost surely, 2^4123113721 is an apocalyptic number.

It is an amenable number.

4123113721 is a deficient number, since it is larger than the sum of its proper divisors (496791).

4123113721 is an equidigital number, since it uses as much as digits as its factorization.

4123113721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496790.

The product of its digits is 1008, while the sum is 25.

The square root of 4123113721 is about 64211.4765520931. The cubic root of 4123113721 is about 1603.5226709733.

Adding to 4123113721 its reverse (1273113214), we get a palindrome (5396226935).

The spelling of 4123113721 in words is "four billion, one hundred twenty-three million, one hundred thirteen thousand, seven hundred twenty-one".