21504551031322 has 8 divisors (see below), whose sum is σ = 32865445915956. Its totient is φ = 10549402392672.

The previous prime is 21504551031263. The next prime is 21504551031409. The reversal of 21504551031322 is 22313015540512.

It can be written as a sum of positive squares in 2 ways, for example, as 21333784560201 + 170766471121 = 4618851^2 + 413239^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101436561363 + ... + 101436561574.

Almost surely, 2^{21504551031322} is an apocalyptic number.

21504551031322 is a deficient number, since it is larger than the sum of its proper divisors (11360894884634).

21504551031322 is a wasteful number, since it uses less digits than its factorization.

21504551031322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202873122992.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 21504551031322 its reverse (22313015540512), we get a palindrome (43817566571834).

The spelling of 21504551031322 in words is "twenty-one trillion, five hundred four billion, five hundred fifty-one million, thirty-one thousand, three hundred twenty-two".