21103021032 has 16 divisors (see below), whose sum is σ = 52757552640. Its totient is φ = 7034340336.

The previous prime is 21103021007. The next prime is 21103021063. The reversal of 21103021032 is 23012030112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439646248 + ... + 439646295.

It is an arithmetic number, because the mean of its divisors is an integer number (3297347040).

Almost surely, 2^21103021032 is an apocalyptic number.

It is an amenable number.

21103021032 is an abundant number, since it is smaller than the sum of its proper divisors (31654531608).

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

21103021032 is a wasteful number, since it uses less digits than its factorization.

21103021032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879292552 (or 879292548 counting only the distinct ones).

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

Adding to 21103021032 its reverse (23012030112), we get a palindrome (44115051144).

The spelling of 21103021032 in words is "twenty-one billion, one hundred three million, twenty-one thousand, thirty-two".