211202220121211 has 16 divisors (see below), whose sum is σ = 242959644858240. Its totient is φ = 181573564173120.

The previous prime is 211202220121141. The next prime is 211202220121241. The reversal of 211202220121211 is 112121022202112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211202220121211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211202220121241) 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 15 ways as a sum of consecutive naturals, for example, 897339650 + ... + 897574983.

It is an arithmetic number, because the mean of its divisors is an integer number (15184977803640).

Almost surely, 2^{211202220121211} is an apocalyptic number.

211202220121211 is a deficient number, since it is larger than the sum of its proper divisors (31757424737029).

211202220121211 is a wasteful number, since it uses less digits than its factorization.

211202220121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794915226.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211202220121211 its reverse (112121022202112), we get a palindrome (323323242323323).

The spelling of 211202220121211 in words is "two hundred eleven trillion, two hundred two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred eleven".