21130012132 has 24 divisors (see below), whose sum is σ = 38736835200. Its totient is φ = 10071568416.

The previous prime is 21130012121. The next prime is 21130012153. The reversal of 21130012132 is 23121003112.

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 7 ways as a sum of consecutive naturals, for example, 1143718 + ... + 1162045.

It is an arithmetic number, because the mean of its divisors is an integer number (1614034800).

Almost surely, 2^21130012132 is an apocalyptic number.

It is an amenable number.

21130012132 is a deficient number, since it is larger than the sum of its proper divisors (17606823068).

21130012132 is a wasteful number, since it uses less digits than its factorization.

21130012132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305875 (or 2305873 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21130012132 its reverse (23121003112), we get a palindrome (44251015244).

The spelling of 21130012132 in words is "twenty-one billion, one hundred thirty million, twelve thousand, one hundred thirty-two".