21221535542032 has 40 divisors (see below), whose sum is σ = 47070595164096. Its totient is φ = 9079449833856.

The previous prime is 21221535541961. The next prime is 21221535542063. The reversal of 21221535542032 is 23024553512212.

It is a junction number, because it is equal to n+sod(n) for n = 21221535541982 and 21221535542000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161329483 + ... + 161460970.

Almost surely, 2^{21221535542032} is an apocalyptic number.

It is an amenable number.

21221535542032 is an abundant number, since it is smaller than the sum of its proper divisors (25849059622064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221535542032 is a wasteful number, since it uses less digits than its factorization.

21221535542032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322791055 (or 322791049 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 21221535542032 in words is "twenty-one trillion, two hundred twenty-one billion, five hundred thirty-five million, five hundred forty-two thousand, thirty-two".