2121221210211 has 24 divisors (see below), whose sum is σ = 3069580999680. Its totient is φ = 1411567257456.

The previous prime is 2121221210161. The next prime is 2121221210219. The reversal of 2121221210211 is 1120121221212.

2121221210211 is a `hidden beast` number, since 2 + 1 + 21 + 221 + 210 + 211 = 666.

It is not a de Polignac number, because 2121221210211 - 2⁷ = 2121221210083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121221210219) 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 23 ways as a sum of consecutive naturals, for example, 12830170 + ... + 12994448.

It is an arithmetic number, because the mean of its divisors is an integer number (127899208320).

Almost surely, 2^{2121221210211} is an apocalyptic number.

2121221210211 is a deficient number, since it is larger than the sum of its proper divisors (948359789469).

2121221210211 is a wasteful number, since it uses less digits than its factorization.

2121221210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166895 (or 166892 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2121221210211 its reverse (1120121221212), we get a palindrome (3241342431423).

The spelling of 2121221210211 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two hundred eleven".