21649842971222 has 16 divisors (see below), whose sum is σ = 34568052058800. Its totient is φ = 10139961934080.

The previous prime is 21649842971219. The next prime is 21649842971291. The reversal of 21649842971222 is 22217924894612.

It is a happy number.

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, 3200742179 + ... + 3200748942.

It is an arithmetic number, because the mean of its divisors is an integer number (2160503253675).

Almost surely, 2^{21649842971222} is an apocalyptic number.

21649842971222 is a deficient number, since it is larger than the sum of its proper divisors (12918209087578).

21649842971222 is a wasteful number, since it uses less digits than its factorization.

21649842971222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401491231.

The product of its digits is 13934592, while the sum is 59.

The spelling of 21649842971222 in words is "twenty-one trillion, six hundred forty-nine billion, eight hundred forty-two million, nine hundred seventy-one thousand, two hundred twenty-two".