21131000322 has 8 divisors (see below), whose sum is σ = 42262000656. Its totient is φ = 7043666772.

The previous prime is 21131000311. The next prime is 21131000377. The reversal of 21131000322 is 22300013112.

It is a sphenic number, since it is the product of 3 distinct primes.

21131000322 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760916688 + ... + 1760916699.

It is an arithmetic number, because the mean of its divisors is an integer number (5282750082).

Almost surely, 2^21131000322 is an apocalyptic number.

21131000322 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21131000322 is a wasteful number, since it uses less digits than its factorization.

21131000322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521833392.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21131000322 its reverse (22300013112), we get a palindrome (43431013434).

The spelling of 21131000322 in words is "twenty-one billion, one hundred thirty-one million, three hundred twenty-two", and thus it is an aban number.