21116150664421 has 32 divisors (see below), whose sum is σ = 22641012172800. Its totient is φ = 19633768012800.

The previous prime is 21116150664377. The next prime is 21116150664443. The reversal of 21116150664421 is 12446605161112.

It is not a de Polignac number, because 21116150664421 - 2³¹ = 21114003180773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116150664451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1979571930 + ... + 1979582596.

It is an arithmetic number, because the mean of its divisors is an integer number (707531630400).

Almost surely, 2^{21116150664421} is an apocalyptic number.

It is an amenable number.

21116150664421 is a deficient number, since it is larger than the sum of its proper divisors (1524861508379).

21116150664421 is a wasteful number, since it uses less digits than its factorization.

21116150664421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13449.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 21116150664421 in words is "twenty-one trillion, one hundred sixteen billion, one hundred fifty million, six hundred sixty-four thousand, four hundred twenty-one".