21213612402344 has 16 divisors (see below), whose sum is σ = 40369187781600. Its totient is φ = 10448495660592.

The previous prime is 21213612402331. The next prime is 21213612402361. The reversal of 21213612402344 is 44320421631212.

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 3 ways as a sum of consecutive naturals, for example, 19788817004 + ... + 19788818075.

It is an arithmetic number, because the mean of its divisors is an integer number (2523074236350).

Almost surely, 2^{21213612402344} is an apocalyptic number.

It is an amenable number.

21213612402344 is a deficient number, since it is larger than the sum of its proper divisors (19155575379256).

21213612402344 is a wasteful number, since it uses less digits than its factorization.

21213612402344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39577635152 (or 39577635148 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 21213612402344 in words is "twenty-one trillion, two hundred thirteen billion, six hundred twelve million, four hundred two thousand, three hundred forty-four".