221122000212121 has 4 divisors (see below), whose sum is σ = 221572350518544. Its totient is φ = 220671649905700.

The previous prime is 221122000212077. The next prime is 221122000212137. The reversal of 221122000212121 is 121212000221122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221122000212121 - 2¹⁷ = 221122000081049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221122000252121) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 225175152475 + ... + 225175153456.

It is an arithmetic number, because the mean of its divisors is an integer number (55393087629636).

Almost surely, 2^{221122000212121} is an apocalyptic number.

It is an amenable number.

221122000212121 is a deficient number, since it is larger than the sum of its proper divisors (450350306423).

221122000212121 is an equidigital number, since it uses as much as digits as its factorization.

221122000212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450350306422.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221122000212121 its reverse (121212000221122), we get a palindrome (342334000433243).

Subtracting from 221122000212121 its reverse (121212000221122), we obtain a palindrome (99909999990999).

The spelling of 221122000212121 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twelve thousand, one hundred twenty-one".