21132130132 has 6 divisors (see below), whose sum is σ = 36981227738. Its totient is φ = 10566065064.

The previous prime is 21132130081. The next prime is 21132130153. The reversal of 21132130132 is 23103123112.

It can be written as a sum of positive squares in only one way, i.e., 11552810256 + 9579319876 = 107484^2 + 97874^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2641516263 + ... + 2641516270.

Almost surely, 2^21132130132 is an apocalyptic number.

It is an amenable number.

21132130132 is a deficient number, since it is larger than the sum of its proper divisors (15849097606).

21132130132 is a wasteful number, since it uses less digits than its factorization.

21132130132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283032537 (or 5283032535 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21132130132 its reverse (23103123112), we get a palindrome (44235253244).

The spelling of 21132130132 in words is "twenty-one billion, one hundred thirty-two million, one hundred thirty thousand, one hundred thirty-two".