211002221121 has 16 divisors (see below), whose sum is σ = 304147348800. Its totient is φ = 129662814528.

The previous prime is 211002221119. The next prime is 211002221179. The reversal of 211002221121 is 121122200112.

It is not a de Polignac number, because 211002221121 - 2¹ = 211002221119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211002221121.

It is not an unprimeable number, because it can be changed into a prime (211002221321) 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, 50022126 + ... + 50026343.

It is an arithmetic number, because the mean of its divisors is an integer number (19009209300).

Almost surely, 2^211002221121 is an apocalyptic number.

It is an amenable number.

211002221121 is a deficient number, since it is larger than the sum of its proper divisors (93145127679).

211002221121 is a wasteful number, since it uses less digits than its factorization.

211002221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100048528.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211002221121 its reverse (121122200112), we get a palindrome (332124421233).

The spelling of 211002221121 in words is "two hundred eleven billion, two million, two hundred twenty-one thousand, one hundred twenty-one".