211002401 has 6 divisors (see below), whose sum is σ = 213081570. Its totient is φ = 208943328.

The previous prime is 211002383. The next prime is 211002409. The reversal of 211002401 is 104200112.

It can be written as a sum of positive squares in only one way, i.e., 207936400 + 3066001 = 14420^2 + 1751^2 .

It is a de Polignac number, because none of the positive numbers 2^k-211002401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211002409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 665 + ... + 20553.

It is an arithmetic number, because the mean of its divisors is an integer number (35513595).

Almost surely, 2^211002401 is an apocalyptic number.

It is an amenable number.

211002401 is a deficient number, since it is larger than the sum of its proper divisors (2079169).

211002401 is an equidigital number, since it uses as much as digits as its factorization.

211002401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20095 (or 19992 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 211002401 is about 14525.9216919272. The cubic root of 211002401 is about 595.3364394370.

Adding to 211002401 its reverse (104200112), we get a palindrome (315202513).

The spelling of 211002401 in words is "two hundred eleven million, two thousand, four hundred one".