21213546045116 has 24 divisors (see below), whose sum is σ = 38031150099600. Its totient is φ = 10347530211200.

The previous prime is 21213546045067. The next prime is 21213546045143. The reversal of 21213546045116 is 61154064531212.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

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, 226166 + ... + 6517533.

It is an arithmetic number, because the mean of its divisors is an integer number (1584631254150).

Almost surely, 2^{21213546045116} is an apocalyptic number.

It is an amenable number.

21213546045116 is a deficient number, since it is larger than the sum of its proper divisors (16817604054484).

21213546045116 is a wasteful number, since it uses less digits than its factorization.

21213546045116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6762925 (or 6762923 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 21213546045116 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-six million, forty-five thousand, one hundred sixteen".