211121201 has 4 divisors (see below), whose sum is σ = 211872804. Its totient is φ = 210369600.

The previous prime is 211121173. The next prime is 211121203. The reversal of 211121201 is 102121112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176252176 + 34869025 = 13276^2 + 5905^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121201 - 2¹⁰ = 211120177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375380 + ... + 375941.

It is an arithmetic number, because the mean of its divisors is an integer number (52968201).

Almost surely, 2^211121201 is an apocalyptic number.

It is an amenable number.

211121201 is a deficient number, since it is larger than the sum of its proper divisors (751603).

211121201 is an equidigital number, since it uses as much as digits as its factorization.

211121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751602.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 211121201 is about 14530.0103578766. The cubic root of 211121201 is about 595.4481485918.

Adding to 211121201 its reverse (102121112), we get a palindrome (313242313).

The spelling of 211121201 in words is "two hundred eleven million, one hundred twenty-one thousand, two hundred one".