21221341263232 has 128 divisors (see below), whose sum is σ = 47019694367520. Its totient is φ = 9458170675200.

The previous prime is 21221341263217. The next prime is 21221341263251. The reversal of 21221341263232 is 23236214312212.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120877788 + ... + 121053220.

Almost surely, 2^{21221341263232} is an apocalyptic number.

21221341263232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21221341263232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23509847183760).

21221341263232 is an abundant number, since it is smaller than the sum of its proper divisors (25798353104288).

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

21221341263232 is a wasteful number, since it uses less digits than its factorization.

21221341263232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177132 (or 177120 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

Adding to 21221341263232 its reverse (23236214312212), we get a palindrome (44457555575444).

The spelling of 21221341263232 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred forty-one million, two hundred sixty-three thousand, two hundred thirty-two".