211132081 has 2 divisors, whose sum is σ = 211132082. Its totient is φ = 211132080.

The previous prime is 211132069. The next prime is 211132091. The reversal of 211132081 is 180231112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209670400 + 1461681 = 14480^2 + 1209^2 .

It is a cyclic number.

It is not a de Polignac number, because 211132081 - 2¹⁷ = 211001009 is a prime.

It is a super-2 number, since 2×211132081² = 89153511254781122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211132091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105566040 + 105566041.

It is an arithmetic number, because the mean of its divisors is an integer number (105566041).

Almost surely, 2^211132081 is an apocalyptic number.

It is an amenable number.

211132081 is a deficient number, since it is larger than the sum of its proper divisors (1).

211132081 is an equidigital number, since it uses as much as digits as its factorization.

211132081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 211132081 is about 14530.3847505839. The cubic root of 211132081 is about 595.4583770997.

Adding to 211132081 its reverse (180231112), we get a palindrome (391363193).

The spelling of 211132081 in words is "two hundred eleven million, one hundred thirty-two thousand, eighty-one".