256121334041 has 4 divisors (see below), whose sum is σ = 256124662992. Its totient is φ = 256118005092.

The previous prime is 256121334023. The next prime is 256121334083. The reversal of 256121334041 is 140433121652.

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 256121334041 - 2⁶ = 256121333977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256121333989 and 256121334007.

It is not an unprimeable number, because it can be changed into a prime (256121334341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1546271 + ... + 1703876.

It is an arithmetic number, because the mean of its divisors is an integer number (64031165748).

Almost surely, 2^256121334041 is an apocalyptic number.

It is an amenable number.

256121334041 is a deficient number, since it is larger than the sum of its proper divisors (3328951).

256121334041 is an equidigital number, since it uses as much as digits as its factorization.

256121334041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328950.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 256121334041 its reverse (140433121652), we get a palindrome (396554455693).

The spelling of 256121334041 in words is "two hundred fifty-six billion, one hundred twenty-one million, three hundred thirty-four thousand, forty-one".