21103221332 has 24 divisors (see below), whose sum is σ = 37299627456. Its totient is φ = 10446242688.

The previous prime is 21103221317. The next prime is 21103221341. The reversal of 21103221332 is 23312230112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2771843 + ... + 2779445.

It is an arithmetic number, because the mean of its divisors is an integer number (1554151144).

Almost surely, 2^21103221332 is an apocalyptic number.

It is an amenable number.

21103221332 is a deficient number, since it is larger than the sum of its proper divisors (16196406124).

21103221332 is a wasteful number, since it uses less digits than its factorization.

21103221332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14447 (or 14445 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21103221332 its reverse (23312230112), we get a palindrome (44415451444).

The spelling of 21103221332 in words is "twenty-one billion, one hundred three million, two hundred twenty-one thousand, three hundred thirty-two".