21001210332 has 12 divisors (see below), whose sum is σ = 49002824136. Its totient is φ = 7000403440.

The previous prime is 21001210327. The next prime is 21001210337. The reversal of 21001210332 is 23301210012.

It is an interprime number because it is at equal distance from previous prime (21001210327) and next prime (21001210337).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001210337) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 875050419 + ... + 875050442.

It is an arithmetic number, because the mean of its divisors is an integer number (4083568678).

Almost surely, 2^21001210332 is an apocalyptic number.

It is an amenable number.

21001210332 is an abundant number, since it is smaller than the sum of its proper divisors (28001613804).

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

21001210332 is a wasteful number, since it uses less digits than its factorization.

21001210332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750100868 (or 1750100866 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21001210332 its reverse (23301210012), we get a palindrome (44302420344).

The spelling of 21001210332 in words is "twenty-one billion, one million, two hundred ten thousand, three hundred thirty-two".