21102032132 has 12 divisors (see below), whose sum is σ = 36959008716. Its totient is φ = 10542315360.

The previous prime is 21102032123. The next prime is 21102032143. The reversal of 21102032132 is 23123020112.

It can be written as a sum of positive squares in 2 ways, for example, as 280696516 + 20821335616 = 16754^2 + 144296^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21102032132.

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, 2169719 + ... + 2179422.

It is an arithmetic number, because the mean of its divisors is an integer number (3079917393).

Almost surely, 2^21102032132 is an apocalyptic number.

It is an amenable number.

21102032132 is a deficient number, since it is larger than the sum of its proper divisors (15856976584).

21102032132 is a wasteful number, since it uses less digits than its factorization.

21102032132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350358 (or 4350356 counting only the distinct ones).

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

Adding to 21102032132 its reverse (23123020112), we get a palindrome (44225052244).

The spelling of 21102032132 in words is "twenty-one billion, one hundred two million, thirty-two thousand, one hundred thirty-two".