21880081133 has 4 divisors (see below), whose sum is σ = 21892976220. Its totient is φ = 21867186048.

The previous prime is 21880081129. The next prime is 21880081141. The reversal of 21880081133 is 33118008812.

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 16380672169 + 5499408964 = 127987^2 + 74158^2 .

It is a cyclic number.

It is not a de Polignac number, because 21880081133 - 2² = 21880081129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21880081093 and 21880081102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21880081933) 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, 6444998 + ... + 6448391.

It is an arithmetic number, because the mean of its divisors is an integer number (5473244055).

Almost surely, 2^21880081133 is an apocalyptic number.

It is an amenable number.

21880081133 is a deficient number, since it is larger than the sum of its proper divisors (12895087).

21880081133 is a wasteful number, since it uses less digits than its factorization.

21880081133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12895086.

The product of its (nonzero) digits is 9216, while the sum is 35.

Adding to 21880081133 its reverse (33118008812), we get a palindrome (54998089945).

The spelling of 21880081133 in words is "twenty-one billion, eight hundred eighty million, eighty-one thousand, one hundred thirty-three".