21133162066 has 8 divisors (see below), whose sum is σ = 31706241660. Its totient is φ = 10564414848.

The previous prime is 21133162049. The next prime is 21133162067. The reversal of 21133162066 is 66026133112.

It can be written as a sum of positive squares in 2 ways, for example, as 21089138841 + 44023225 = 145221^2 + 6635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21133162066² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21133162067) 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, 1070871 + ... + 1090426.

Almost surely, 2^21133162066 is an apocalyptic number.

21133162066 is a deficient number, since it is larger than the sum of its proper divisors (10573079594).

21133162066 is a wasteful number, since it uses less digits than its factorization.

21133162066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166188.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 21133162066 its reverse (66026133112), we get a palindrome (87159295178).

The spelling of 21133162066 in words is "twenty-one billion, one hundred thirty-three million, one hundred sixty-two thousand, sixty-six".