11420801281 has 4 divisors (see below), whose sum is σ = 11504164932. Its totient is φ = 11337437632.

The previous prime is 11420801269. The next prime is 11420801339. The reversal of 11420801281 is 18210802411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7132647025 + 4288154256 = 84455^2 + 65484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11420801281 is a prime.

It is a super-2 number, since 2×11420801281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11420801221) 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, 41681620 + ... + 41681893.

It is an arithmetic number, because the mean of its divisors is an integer number (2876041233).

Almost surely, 2^11420801281 is an apocalyptic number.

It is an amenable number.

11420801281 is a deficient number, since it is larger than the sum of its proper divisors (83363651).

11420801281 is an equidigital number, since it uses as much as digits as its factorization.

11420801281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83363650.

The product of its (nonzero) digits is 1024, while the sum is 28.

The spelling of 11420801281 in words is "eleven billion, four hundred twenty million, eight hundred one thousand, two hundred eighty-one".