21115344466212 has 24 divisors (see below), whose sum is σ = 49285338796512. Its totient is φ = 7036133625600.

The previous prime is 21115344466171. The next prime is 21115344466241. The reversal of 21115344466212 is 21266444351112.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 289278214 + ... + 289351197.

It is an arithmetic number, because the mean of its divisors is an integer number (2053555783188).

Almost surely, 2^{21115344466212} is an apocalyptic number.

It is an amenable number.

21115344466212 is an abundant number, since it is smaller than the sum of its proper divisors (28169994330300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115344466212 is a wasteful number, since it uses less digits than its factorization.

21115344466212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578632459 (or 578632457 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The spelling of 21115344466212 in words is "twenty-one trillion, one hundred fifteen billion, three hundred forty-four million, four hundred sixty-six thousand, two hundred twelve".