21103322132 has 12 divisors (see below), whose sum is σ = 37084055316. Its totient is φ = 10507877760.

The previous prime is 21103322129. The next prime is 21103322143. The reversal of 21103322132 is 23122330112.

It can be written as a sum of positive squares in 2 ways, for example, as 17647528336 + 3455793796 = 132844^2 + 58786^2 .

It is a super-2 number, since 2×21103322132² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10944743 + ... + 10946670.

It is an arithmetic number, because the mean of its divisors is an integer number (3090337943).

Almost surely, 2^21103322132 is an apocalyptic number.

It is an amenable number.

21103322132 is a deficient number, since it is larger than the sum of its proper divisors (15980733184).

21103322132 is a wasteful number, since it uses less digits than its factorization.

21103322132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21891658 (or 21891656 counting only the distinct ones).

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

Adding to 21103322132 its reverse (23122330112), we get a palindrome (44225652244).

The spelling of 21103322132 in words is "twenty-one billion, one hundred three million, three hundred twenty-two thousand, one hundred thirty-two".