211211120221211 has 16 divisors (see below), whose sum is σ = 233013513777408. Its totient is φ = 189847520412000.

The previous prime is 211211120221133. The next prime is 211211120221229. The reversal of 211211120221211 is 112122021112112.

It is a happy number.

It is not a de Polignac number, because 211211120221211 - 2¹⁰ = 211211120220187 is a prime.

It is a super-2 number, since 2×211211120221211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211211120221271) 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, 129941285 + ... + 131556678.

It is an arithmetic number, because the mean of its divisors is an integer number (14563344611088).

Almost surely, 2^{211211120221211} is an apocalyptic number.

211211120221211 is a deficient number, since it is larger than the sum of its proper divisors (21802393556197).

211211120221211 is a wasteful number, since it uses less digits than its factorization.

211211120221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261498802.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211211120221211 its reverse (112122021112112), we get a palindrome (323333141333323).

It can be divided in two parts, 2112111 and 20221211, that added together give a palindrome (22333322).

The spelling of 211211120221211 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred twenty million, two hundred twenty-one thousand, two hundred eleven".