2121222221211 has 8 divisors (see below), whose sum is σ = 2904736735504. Its totient is φ = 1375927927200.

The previous prime is 2121222221201. The next prime is 2121222221213. The reversal of 2121222221211 is 1121222221212.

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

It is not a de Polignac number, because 2121222221211 - 2⁹ = 2121222220699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121222221213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9555054940 + ... + 9555055161.

It is an arithmetic number, because the mean of its divisors is an integer number (363092091938).

Almost surely, 2^{2121222221211} is an apocalyptic number.

2121222221211 is a deficient number, since it is larger than the sum of its proper divisors (783514514293).

2121222221211 is a wasteful number, since it uses less digits than its factorization.

2121222221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19110110141.

The product of its digits is 256, while the sum is 21.

Adding to 2121222221211 its reverse (1121222221212), we get a palindrome (3242444442423).

Subtracting from 2121222221211 its reverse (1121222221212), we obtain a palindrome (999999999999).

The spelling of 2121222221211 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred eleven".