211211149 has 2 divisors, whose sum is σ = 211211150. Its totient is φ = 211211148.

The previous prime is 211211123. The next prime is 211211159. The reversal of 211211149 is 941112112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152028900 + 59182249 = 12330^2 + 7693^2 .

It is a cyclic number.

It is not a de Polignac number, because 211211149 - 2²⁷ = 76993421 is a prime.

It is a super-2 number, since 2×211211149² = 89220298923800402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211211159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605574 + 105605575.

It is an arithmetic number, because the mean of its divisors is an integer number (105605575).

Almost surely, 2^211211149 is an apocalyptic number.

It is an amenable number.

211211149 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211149 is an equidigital number, since it uses as much as digits as its factorization.

211211149 is an odious number, because the sum of its binary digits is odd.

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

The square root of 211211149 is about 14533.1052772627. The cubic root of 211211149 is about 595.5326999701.

The spelling of 211211149 in words is "two hundred eleven million, two hundred eleven thousand, one hundred forty-nine".