11256318421 has 4 divisors (see below), whose sum is σ = 11518093312. Its totient is φ = 10994543532.

The previous prime is 11256318413. The next prime is 11256318499. The reversal of 11256318421 is 12481365211.

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 11256318421 - 2³ = 11256318413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11256318401) 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, 130887381 + ... + 130887466.

It is an arithmetic number, because the mean of its divisors is an integer number (2879523328).

Almost surely, 2^11256318421 is an apocalyptic number.

It is an amenable number.

11256318421 is a deficient number, since it is larger than the sum of its proper divisors (261774891).

11256318421 is an equidigital number, since it uses as much as digits as its factorization.

11256318421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261774890.

The product of its digits is 11520, while the sum is 34.

The spelling of 11256318421 in words is "eleven billion, two hundred fifty-six million, three hundred eighteen thousand, four hundred twenty-one".