21133443066 has 16 divisors (see below), whose sum is σ = 42268757664. Its totient is φ = 7044169104.

The previous prime is 21133443061. The next prime is 21133443131. The reversal of 21133443066 is 66034433112.

It is not an unprimeable number, because it can be changed into a prime (21133443061) 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, 100101 + ... + 228663.

It is an arithmetic number, because the mean of its divisors is an integer number (2641797354).

Almost surely, 2^21133443066 is an apocalyptic number.

21133443066 is an abundant number, since it is smaller than the sum of its proper divisors (21135314598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21133443066 is a wasteful number, since it uses less digits than its factorization.

21133443066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155965.

The product of its (nonzero) digits is 31104, while the sum is 33.

Adding to 21133443066 its reverse (66034433112), we get a palindrome (87167876178).

The spelling of 21133443066 in words is "twenty-one billion, one hundred thirty-three million, four hundred forty-three thousand, sixty-six".