21202233132166 has 4 divisors (see below), whose sum is σ = 31803349698252. Its totient is φ = 10601116566082.

The previous prime is 21202233132163. The next prime is 21202233132167. The reversal of 21202233132166 is 66123133220212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202233132163) 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 as a sum of consecutive naturals, namely, 5300558283040 + ... + 5300558283043.

It is an arithmetic number, because the mean of its divisors is an integer number (7950837424563).

Almost surely, 2^{21202233132166} is an apocalyptic number.

21202233132166 is a deficient number, since it is larger than the sum of its proper divisors (10601116566086).

21202233132166 is a wasteful number, since it uses less digits than its factorization.

21202233132166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601116566085.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 21202233132166 its reverse (66123133220212), we get a palindrome (87325366352378).

The spelling of 21202233132166 in words is "twenty-one trillion, two hundred two billion, two hundred thirty-three million, one hundred thirty-two thousand, one hundred sixty-six".