21222004113121 has 32 divisors (see below), whose sum is σ = 25024462848000. Its totient is φ = 17616802746816.

The previous prime is 21222004112999. The next prime is 21222004113137. The reversal of 21222004113121 is 12131140022212.

It is not a de Polignac number, because 21222004113121 - 2⁷ = 21222004112993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222004113092 and 21222004113101.

It is not an unprimeable number, because it can be changed into a prime (21222004113151) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 487851630 + ... + 487895128.

It is an arithmetic number, because the mean of its divisors is an integer number (782014464000).

Almost surely, 2^{21222004113121} is an apocalyptic number.

It is an amenable number.

21222004113121 is a deficient number, since it is larger than the sum of its proper divisors (3802458734879).

21222004113121 is a wasteful number, since it uses less digits than its factorization.

21222004113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52213.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21222004113121 its reverse (12131140022212), we get a palindrome (33353144135333).

The spelling of 21222004113121 in words is "twenty-one trillion, two hundred twenty-two billion, four million, one hundred thirteen thousand, one hundred twenty-one".