2121122111211 has 12 divisors (see below), whose sum is σ = 3177318718392. Its totient is φ = 1414081407312.

The previous prime is 2121122111209. The next prime is 2121122111233. The reversal of 2121122111211 is 1121112211212.

It is a happy number.

2121122111211 is a `hidden beast` number, since 21 + 211 + 221 + 1 + 1 + 211 = 666.

It is not a de Polignac number, because 2121122111211 - 2¹ = 2121122111209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121122111411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4364448546 + ... + 4364449031.

It is an arithmetic number, because the mean of its divisors is an integer number (264776559866).

Almost surely, 2^{2121122111211} is an apocalyptic number.

2121122111211 is a deficient number, since it is larger than the sum of its proper divisors (1056196607181).

2121122111211 is an frugal number, since it uses more digits than its factorization.

2121122111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8728897592 (or 8728897580 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 2121122111211 its reverse (1121112211212), we get a palindrome (3242234322423).

The spelling of 2121122111211 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred eleven".