23256121043 has 4 divisors (see below), whose sum is σ = 24006318528. Its totient is φ = 22505923560.

The previous prime is 23256120949. The next prime is 23256121051. The reversal of 23256121043 is 34012165232.

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 23256121043 - 2²² = 23251926739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23256120997 and 23256121015.

It is not an unprimeable number, because it can be changed into a prime (23256127043) 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, 375098696 + ... + 375098757.

It is an arithmetic number, because the mean of its divisors is an integer number (6001579632).

Almost surely, 2^23256121043 is an apocalyptic number.

23256121043 is a deficient number, since it is larger than the sum of its proper divisors (750197485).

23256121043 is an equidigital number, since it uses as much as digits as its factorization.

23256121043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750197484.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 23256121043 its reverse (34012165232), we get a palindrome (57268286275).

The spelling of 23256121043 in words is "twenty-three billion, two hundred fifty-six million, one hundred twenty-one thousand, forty-three".