21221546122443 has 8 divisors (see below), whose sum is σ = 28295593300800. Its totient is φ = 14147598179528.

The previous prime is 21221546122429. The next prime is 21221546122477. The reversal of 21221546122443 is 34422164512212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21221546122443 - 2⁶ = 21221546122379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221546122643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24308433 + ... + 25166306.

It is an arithmetic number, because the mean of its divisors is an integer number (3536949162600).

Almost surely, 2^{21221546122443} is an apocalyptic number.

21221546122443 is a deficient number, since it is larger than the sum of its proper divisors (7074047178357).

21221546122443 is a wasteful number, since it uses less digits than its factorization.

21221546122443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49617721.

The product of its digits is 184320, while the sum is 39.

The spelling of 21221546122443 in words is "twenty-one trillion, two hundred twenty-one billion, five hundred forty-six million, one hundred twenty-two thousand, four hundred forty-three".