211980001 has 2 divisors, whose sum is σ = 211980002. Its totient is φ = 211980000.

The previous prime is 211979959. The next prime is 211980007. The reversal of 211980001 is 100089112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201611601 + 10368400 = 14199^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 211980001 - 2²³ = 203591393 is a prime.

It is not a weakly prime, because it can be changed into another prime (211980007) 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 as a sum of consecutive naturals, namely, 105990000 + 105990001.

It is an arithmetic number, because the mean of its divisors is an integer number (105990001).

Almost surely, 2^211980001 is an apocalyptic number.

It is an amenable number.

211980001 is a deficient number, since it is larger than the sum of its proper divisors (1).

211980001 is an equidigital number, since it uses as much as digits as its factorization.

211980001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 211980001 is about 14559.5329938841. The cubic root of 211980001 is about 596.2544453929.

The spelling of 211980001 in words is "two hundred eleven million, nine hundred eighty thousand, one".