21216403264132 has 24 divisors (see below), whose sum is σ = 38132417274560. Its totient is φ = 10321430404320.

The previous prime is 21216403264079. The next prime is 21216403264151. The reversal of 21216403264132 is 23146230461212.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 21216403264091 and 21216403264100.

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, 31900969 + ... + 32559247.

Almost surely, 2^{21216403264132} is an apocalyptic number.

It is an amenable number.

21216403264132 is a deficient number, since it is larger than the sum of its proper divisors (16916014010428).

21216403264132 is a wasteful number, since it uses less digits than its factorization.

21216403264132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876091 (or 876089 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 21216403264132 in words is "twenty-one trillion, two hundred sixteen billion, four hundred three million, two hundred sixty-four thousand, one hundred thirty-two".