21112516002766 has 8 divisors (see below), whose sum is σ = 31976237829744. Its totient is φ = 10453770059520.

The previous prime is 21112516002749. The next prime is 21112516002769. The reversal of 21112516002766 is 66720061521112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112516002769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51243970675 + ... + 51243971086.

It is an arithmetic number, because the mean of its divisors is an integer number (3997029728718).

Almost surely, 2^{21112516002766} is an apocalyptic number.

21112516002766 is a deficient number, since it is larger than the sum of its proper divisors (10863721826978).

21112516002766 is a wasteful number, since it uses less digits than its factorization.

21112516002766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102487941866.

The product of its (nonzero) digits is 60480, while the sum is 40.

Adding to 21112516002766 its reverse (66720061521112), we get a palindrome (87832577523878).

The spelling of 21112516002766 in words is "twenty-one trillion, one hundred twelve billion, five hundred sixteen million, two thousand, seven hundred sixty-six".