21001323332 has 12 divisors (see below), whose sum is σ = 40093435536. Its totient is φ = 9546056040.

The previous prime is 21001323313. The next prime is 21001323341. The reversal of 21001323332 is 23332310012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238651358 + ... + 238651445.

It is an arithmetic number, because the mean of its divisors is an integer number (3341119628).

Almost surely, 2^21001323332 is an apocalyptic number.

21001323332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21001323332 is a deficient number, since it is larger than the sum of its proper divisors (19092112204).

21001323332 is a wasteful number, since it uses less digits than its factorization.

21001323332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477302818 (or 477302816 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21001323332 its reverse (23332310012), we get a palindrome (44333633344).

The spelling of 21001323332 in words is "twenty-one billion, one million, three hundred twenty-three thousand, three hundred thirty-two".