21216026563332 has 48 divisors (see below), whose sum is σ = 49778575322112. Its totient is φ = 7032794250240.

The previous prime is 21216026563313. The next prime is 21216026563339. The reversal of 21216026563332 is 23336562061212.

It is not an unprimeable number, because it can be changed into a prime (21216026563339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198864948 + ... + 198971604.

It is an arithmetic number, because the mean of its divisors is an integer number (1037053652544).

Almost surely, 2^{21216026563332} is an apocalyptic number.

It is an amenable number.

21216026563332 is an abundant number, since it is smaller than the sum of its proper divisors (28562548758780).

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

21216026563332 is a wasteful number, since it uses less digits than its factorization.

21216026563332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198428 (or 198426 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 21216026563332 in words is "twenty-one trillion, two hundred sixteen billion, twenty-six million, five hundred sixty-three thousand, three hundred thirty-two".