21001102232 has 32 divisors (see below), whose sum is σ = 42970521600. Its totient is φ = 9542906400.

The previous prime is 21001102219. The next prime is 21001102247. The reversal of 21001102232 is 23220110012.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251369 + ... + 324327.

It is an arithmetic number, because the mean of its divisors is an integer number (1342828800).

Almost surely, 2^21001102232 is an apocalyptic number.

21001102232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21001102232 is an abundant number, since it is smaller than the sum of its proper divisors (21969419368).

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

21001102232 is a wasteful number, since it uses less digits than its factorization.

21001102232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76247 (or 76243 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21001102232 its reverse (23220110012), we get a palindrome (44221212244).

The spelling of 21001102232 in words is "twenty-one billion, one million, one hundred two thousand, two hundred thirty-two".