256211760121 has 8 divisors (see below), whose sum is σ = 258094760544. Its totient is φ = 254328946080.

The previous prime is 256211760113. The next prime is 256211760127. The reversal of 256211760121 is 121067112652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256211760121 - 2³ = 256211760113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256211760127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3990886 + ... + 4054576.

It is an arithmetic number, because the mean of its divisors is an integer number (32261845068).

Almost surely, 2^256211760121 is an apocalyptic number.

It is an amenable number.

256211760121 is a deficient number, since it is larger than the sum of its proper divisors (1883000423).

256211760121 is a wasteful number, since it uses less digits than its factorization.

256211760121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93191.

The product of its (nonzero) digits is 10080, while the sum is 34.

Adding to 256211760121 its reverse (121067112652), we get a palindrome (377278872773).

The spelling of 256211760121 in words is "two hundred fifty-six billion, two hundred eleven million, seven hundred sixty thousand, one hundred twenty-one".