21116010321466 has 8 divisors (see below), whose sum is σ = 31707251597844. Its totient is φ = 10546926455520.

The previous prime is 21116010321443. The next prime is 21116010321517. The reversal of 21116010321466 is 66412301061112.

It can be written as a sum of positive squares in 2 ways, for example, as 20735919576241 + 380090745225 = 4553671^2 + 616515^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539350225 + ... + 5539354036.

Almost surely, 2^{21116010321466} is an apocalyptic number.

21116010321466 is a deficient number, since it is larger than the sum of its proper divisors (10591241276378).

21116010321466 is a wasteful number, since it uses less digits than its factorization.

21116010321466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078705216.

The product of its (nonzero) digits is 10368, while the sum is 34.

Adding to 21116010321466 its reverse (66412301061112), we get a palindrome (87528311382578).

The spelling of 21116010321466 in words is "twenty-one trillion, one hundred sixteen billion, ten million, three hundred twenty-one thousand, four hundred sixty-six".