21012210332 has 12 divisors (see below), whose sum is σ = 37096779216. Its totient is φ = 10413130560.

The previous prime is 21012210311. The next prime is 21012210377. The reversal of 21012210332 is 23301221012.

It is a self number, because there is not a number n which added to its sum of digits gives 21012210332.

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 3 ways as a sum of consecutive naturals, for example, 23243144 + ... + 23244047.

It is an arithmetic number, because the mean of its divisors is an integer number (3091398268).

Almost surely, 2^21012210332 is an apocalyptic number.

It is an amenable number.

21012210332 is a deficient number, since it is larger than the sum of its proper divisors (16084568884).

21012210332 is a wasteful number, since it uses less digits than its factorization.

21012210332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46487308 (or 46487306 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21012210332 its reverse (23301221012), we get a palindrome (44313431344).

The spelling of 21012210332 in words is "twenty-one billion, twelve million, two hundred ten thousand, three hundred thirty-two".