212002001 has 4 divisors (see below), whose sum is σ = 214906212. Its totient is φ = 209097792.

The previous prime is 212001983. The next prime is 212002027. The reversal of 212002001 is 100200212.

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 127803025 + 84198976 = 11305^2 + 9176^2 .

It is a cyclic number.

It is not a de Polignac number, because 212002001 - 2²⁶ = 144893137 is a prime.

It is a super-4 number, since 4×212002001⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

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 212002001.

It is not an unprimeable number, because it can be changed into a prime (212002031) 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, 1451996 + ... + 1452141.

It is an arithmetic number, because the mean of its divisors is an integer number (53726553).

Almost surely, 2^212002001 is an apocalyptic number.

It is an amenable number.

212002001 is a deficient number, since it is larger than the sum of its proper divisors (2904211).

212002001 is an equidigital number, since it uses as much as digits as its factorization.

212002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904210.

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

The square root of 212002001 is about 14560.2884930210. The cubic root of 212002001 is about 596.2750717789.

Adding to 212002001 its reverse (100200212), we get a palindrome (312202213).

The spelling of 212002001 in words is "two hundred twelve million, two thousand, one".