21231302132 has 12 divisors (see below), whose sum is σ = 37157200416. Its totient is φ = 10614959160.

The previous prime is 21231302129. The next prime is 21231302167. The reversal of 21231302132 is 23120313212.

It is a super-3 number, since 3×21231302132³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100568 + ... + 229295.

It is an arithmetic number, because the mean of its divisors is an integer number (3096433368).

Almost surely, 2^21231302132 is an apocalyptic number.

It is an amenable number.

21231302132 is a deficient number, since it is larger than the sum of its proper divisors (15925898284).

21231302132 is a wasteful number, since it uses less digits than its factorization.

21231302132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345958 (or 345956 counting only the distinct ones).

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

Adding to 21231302132 its reverse (23120313212), we get a palindrome (44351615344).

The spelling of 21231302132 in words is "twenty-one billion, two hundred thirty-one million, three hundred two thousand, one hundred thirty-two".