21221323302 has 32 divisors (see below), whose sum is σ = 42969709440. Its totient is φ = 6985993280.

The previous prime is 21221323297. The next prime is 21221323337. The reversal of 21221323302 is 20332312212.

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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1756402 + ... + 1768442.

It is an arithmetic number, because the mean of its divisors is an integer number (1342803420).

Almost surely, 2^21221323302 is an apocalyptic number.

21221323302 is an abundant number, since it is smaller than the sum of its proper divisors (21748386138).

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

21221323302 is a wasteful number, since it uses less digits than its factorization.

21221323302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15668.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21221323302 its reverse (20332312212), we get a palindrome (41553635514).

The spelling of 21221323302 in words is "twenty-one billion, two hundred twenty-one million, three hundred twenty-three thousand, three hundred two".