21221003302332 has 24 divisors (see below), whose sum is σ = 49515973893456. Its totient is φ = 7073624978688.

The previous prime is 21221003302259. The next prime is 21221003302349. The reversal of 21221003302332 is 23320330012212.

It is a congruent number.

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, 3249183 + ... + 7280054.

It is an arithmetic number, because the mean of its divisors is an integer number (2063165578894).

Almost surely, 2^{21221003302332} is an apocalyptic number.

It is an amenable number.

21221003302332 is an abundant number, since it is smaller than the sum of its proper divisors (28294970591124).

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

21221003302332 is a wasteful number, since it uses less digits than its factorization.

21221003302332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10697197 (or 10697195 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21221003302332 its reverse (23320330012212), we get a palindrome (44541333314544).

The spelling of 21221003302332 in words is "twenty-one trillion, two hundred twenty-one billion, three million, three hundred two thousand, three hundred thirty-two".