21150022664365 has 8 divisors (see below), whose sum is σ = 29005745368320. Its totient is φ = 14502872684112.

The previous prime is 21150022664341. The next prime is 21150022664371. The reversal of 21150022664365 is 56346622005112.

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

It is a cyclic number.

It is not a de Polignac number, because 21150022664365 - 2¹⁵ = 21150022631597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302143180885 + ... + 302143180954.

It is an arithmetic number, because the mean of its divisors is an integer number (3625718171040).

Almost surely, 2^{21150022664365} is an apocalyptic number.

It is an amenable number.

21150022664365 is a deficient number, since it is larger than the sum of its proper divisors (7855722703955).

21150022664365 is an equidigital number, since it uses as much as digits as its factorization.

21150022664365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604286361851.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 21150022664365 its reverse (56346622005112), we get a palindrome (77496644669477).

The spelling of 21150022664365 in words is "twenty-one trillion, one hundred fifty billion, twenty-two million, six hundred sixty-four thousand, three hundred sixty-five".