21222004636154 has 8 divisors (see below), whose sum is σ = 36380579376288. Its totient is φ = 9095144844060.

The previous prime is 21222004636139. The next prime is 21222004636163. The reversal of 21222004636154 is 45163640022212.

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

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, 757928736992 + ... + 757928737019.

It is an arithmetic number, because the mean of its divisors is an integer number (4547572422036).

Almost surely, 2^{21222004636154} is an apocalyptic number.

21222004636154 is a deficient number, since it is larger than the sum of its proper divisors (15158574740134).

21222004636154 is a wasteful number, since it uses less digits than its factorization.

21222004636154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515857474020.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 21222004636154 its reverse (45163640022212), we get a palindrome (66385644658366).

The spelling of 21222004636154 in words is "twenty-one trillion, two hundred twenty-two billion, four million, six hundred thirty-six thousand, one hundred fifty-four".