11000420881 has 4 divisors (see below), whose sum is σ = 11151111652. Its totient is φ = 10849730112.

The previous prime is 11000420839. The next prime is 11000420927. The reversal of 11000420881 is 18802400011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18802400011 = 2339 ⋅8038649.

It can be written as a sum of positive squares in 2 ways, for example, as 5258570256 + 5741850625 = 72516^2 + 75775^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000420881 - 2¹⁷ = 11000289809 is a prime.

It is a super-2 number, since 2×11000420881² (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 (11000421881) 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, 75345276 + ... + 75345421.

It is an arithmetic number, because the mean of its divisors is an integer number (2787777913).

Almost surely, 2^11000420881 is an apocalyptic number.

It is an amenable number.

11000420881 is a deficient number, since it is larger than the sum of its proper divisors (150690771).

11000420881 is an equidigital number, since it uses as much as digits as its factorization.

11000420881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150690770.

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 11000420881 its reverse (18802400011), we get a palindrome (29802820892).

The spelling of 11000420881 in words is "eleven billion, four hundred twenty thousand, eight hundred eighty-one".