211001121 has 24 divisors (see below), whose sum is σ = 314263040. Its totient is φ = 136321056.

The previous prime is 211001107. The next prime is 211001143. The reversal of 211001121 is 121100112.

It is a happy number.

211001121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211001121 - 2⁹ = 211000609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211001101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93120 + ... + 95358.

Almost surely, 2^211001121 is an apocalyptic number.

It is an amenable number.

211001121 is a deficient number, since it is larger than the sum of its proper divisors (103261919).

211001121 is a wasteful number, since it uses less digits than its factorization.

211001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565 (or 2562 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 211001121 is about 14525.8776326940. The cubic root of 211001121 is about 595.3352356084.

Adding to 211001121 its reverse (121100112), we get a palindrome (332101233).

The spelling of 211001121 in words is "two hundred eleven million, one thousand, one hundred twenty-one".