21115321466446 has 16 divisors (see below), whose sum is σ = 33014516346576. Its totient is φ = 10119000361536.

The previous prime is 21115321466441. The next prime is 21115321466471. The reversal of 21115321466446 is 64466412351112.

It is a junction number, because it is equal to n+sod(n) for n = 21115321466396 and 21115321466405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115321466441) 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 7 ways as a sum of consecutive naturals, for example, 2129414311 + ... + 2129424226.

It is an arithmetic number, because the mean of its divisors is an integer number (2063407271661).

Almost surely, 2^{21115321466446} is an apocalyptic number.

21115321466446 is a deficient number, since it is larger than the sum of its proper divisors (11899194880130).

21115321466446 is a wasteful number, since it uses less digits than its factorization.

21115321466446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258838643.

The product of its digits is 829440, while the sum is 46.

The spelling of 21115321466446 in words is "twenty-one trillion, one hundred fifteen billion, three hundred twenty-one million, four hundred sixty-six thousand, four hundred forty-six".