21222052413503 has 4 divisors (see below), whose sum is σ = 21223595737008. Its totient is φ = 21220509090000.

The previous prime is 21222052413481. The next prime is 21222052413607. The reversal of 21222052413503 is 30531425022212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21222052413503 - 2⁴⁰ = 20122540785727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222052413503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222052412503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771641126 + ... + 771668627.

It is an arithmetic number, because the mean of its divisors is an integer number (5305898934252).

Almost surely, 2^{21222052413503} is an apocalyptic number.

21222052413503 is a deficient number, since it is larger than the sum of its proper divisors (1543323505).

21222052413503 is a wasteful number, since it uses less digits than its factorization.

21222052413503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543323504.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21222052413503 its reverse (30531425022212), we get a palindrome (51753477435715).

The spelling of 21222052413503 in words is "twenty-one trillion, two hundred twenty-two billion, fifty-two million, four hundred thirteen thousand, five hundred three".