2121211201211 has 16 divisors (see below), whose sum is σ = 2319652608768. Its totient is φ = 1931022105600.

The previous prime is 2121211201163. The next prime is 2121211201229. The reversal of 2121211201211 is 1121021121212.

It is a cyclic number.

It is not a de Polignac number, because 2121211201211 - 2¹⁰ = 2121211200187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121211201211.

It is not an unprimeable number, because it can be changed into a prime (2121211201271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43880 + ... + 2060181.

It is an arithmetic number, because the mean of its divisors is an integer number (144978288048).

Almost surely, 2^{2121211201211} is an apocalyptic number.

2121211201211 is a deficient number, since it is larger than the sum of its proper divisors (198441407557).

2121211201211 is a wasteful number, since it uses less digits than its factorization.

2121211201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106022.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2121211201211 its reverse (1121021121212), we get a palindrome (3242232322423).

The spelling of 2121211201211 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, two hundred one thousand, two hundred eleven".