21531424103132 has 12 divisors (see below), whose sum is σ = 38979302255880. Its totient is φ = 10394480601456.

The previous prime is 21531424103087. The next prime is 21531424103149. The reversal of 21531424103132 is 23130142413512.

It is a happy number.

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, 92807862398 + ... + 92807862629.

It is an arithmetic number, because the mean of its divisors is an integer number (3248275187990).

Almost surely, 2^{21531424103132} is an apocalyptic number.

It is an amenable number.

21531424103132 is a deficient number, since it is larger than the sum of its proper divisors (17447878152748).

21531424103132 is a wasteful number, since it uses less digits than its factorization.

21531424103132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185615725060 (or 185615725058 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21531424103132 its reverse (23130142413512), we get a palindrome (44661566516644).

The spelling of 21531424103132 in words is "twenty-one trillion, five hundred thirty-one billion, four hundred twenty-four million, one hundred three thousand, one hundred thirty-two".