211320001 has 4 divisors (see below), whose sum is σ = 211522500. Its totient is φ = 211117504.

The previous prime is 211319993. The next prime is 211320041. The reversal of 211320001 is 100023112.

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 88642225 + 122677776 = 9415^2 + 11076^2 .

It is a cyclic number.

It is not a de Polignac number, because 211320001 - 2³ = 211319993 is a prime.

It is a super-2 number, since 2×211320001² = 89312285645280002, which contains 22 as substring.

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 211320001.

It is not an unprimeable number, because it can be changed into a prime (211320041) 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, 99676 + ... + 101773.

It is an arithmetic number, because the mean of its divisors is an integer number (52880625).

Almost surely, 2^211320001 is an apocalyptic number.

It is an amenable number.

211320001 is a deficient number, since it is larger than the sum of its proper divisors (202499).

211320001 is a wasteful number, since it uses less digits than its factorization.

211320001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202498.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 211320001 is about 14536.8497618982. The cubic root of 211320001 is about 595.6349890659.

Adding to 211320001 its reverse (100023112), we get a palindrome (311343113).

The spelling of 211320001 in words is "two hundred eleven million, three hundred twenty thousand, one".