21216166300466 has 32 divisors (see below), whose sum is σ = 32011428355200. Its totient is φ = 10545859152000.

The previous prime is 21216166300411. The next prime is 21216166300519. The reversal of 21216166300466 is 66400366161212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750647155 + ... + 1750659273.

It is an arithmetic number, because the mean of its divisors is an integer number (1000357136100).

Almost surely, 2^{21216166300466} is an apocalyptic number.

21216166300466 is a deficient number, since it is larger than the sum of its proper divisors (10795262054734).

21216166300466 is a wasteful number, since it uses less digits than its factorization.

21216166300466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18674.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 21216166300466 in words is "twenty-one trillion, two hundred sixteen billion, one hundred sixty-six million, three hundred thousand, four hundred sixty-six".