21011302232 has 8 divisors (see below), whose sum is σ = 39396191700. Its totient is φ = 10505651112.

The previous prime is 21011302223. The next prime is 21011302261. The reversal of 21011302232 is 23220311012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21011302232.

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 as a sum of consecutive naturals, namely, 1313206382 + ... + 1313206397.

Almost surely, 2^21011302232 is an apocalyptic number.

It is an amenable number.

21011302232 is a deficient number, since it is larger than the sum of its proper divisors (18384889468).

21011302232 is a wasteful number, since it uses less digits than its factorization.

21011302232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626412785 (or 2626412781 counting only the distinct ones).

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

Adding to 21011302232 its reverse (23220311012), we get a palindrome (44231613244).

The spelling of 21011302232 in words is "twenty-one billion, eleven million, three hundred two thousand, two hundred thirty-two".