211020120121211 has 16 divisors (see below), whose sum is σ = 225647414544384. Its totient is φ = 196876515812064.

The previous prime is 211020120121193. The next prime is 211020120121241. The reversal of 211020120121211 is 112121021020112.

It is not a de Polignac number, because 211020120121211 - 2¹⁸ = 211020119859067 is a prime.

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 211020120121211.

It is not an unprimeable number, because it can be changed into a prime (211020120121241) 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, 332803151 + ... + 333436616.

It is an arithmetic number, because the mean of its divisors is an integer number (14102963409024).

Almost surely, 2^{211020120121211} is an apocalyptic number.

211020120121211 is a deficient number, since it is larger than the sum of its proper divisors (14627294423173).

211020120121211 is a wasteful number, since it uses less digits than its factorization.

211020120121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666240130.

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

Adding to 211020120121211 its reverse (112121021020112), we get a palindrome (323141141141323).

The spelling of 211020120121211 in words is "two hundred eleven trillion, twenty billion, one hundred twenty million, one hundred twenty-one thousand, two hundred eleven".