21230134132 has 12 divisors (see below), whose sum is σ = 37171522080. Its totient is φ = 10609699256.

The previous prime is 21230134129. The next prime is 21230134151. The reversal of 21230134132 is 23143103212.

It is a super-2 number, since 2×21230134132² (a number of 21 digits) contains 22 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1333048 + ... + 1348879.

It is an arithmetic number, because the mean of its divisors is an integer number (3097626840).

Almost surely, 2^21230134132 is an apocalyptic number.

It is an amenable number.

21230134132 is a deficient number, since it is larger than the sum of its proper divisors (15941387948).

21230134132 is a wasteful number, since it uses less digits than its factorization.

21230134132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683910 (or 2683908 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21230134132 its reverse (23143103212), we get a palindrome (44373237344).

The spelling of 21230134132 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-four thousand, one hundred thirty-two".