211121089 has 2 divisors, whose sum is σ = 211121090. Its totient is φ = 211121088.

The previous prime is 211121081. The next prime is 211121107. The reversal of 211121089 is 980121112.

211121089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210105025 + 1016064 = 14495^2 + 1008^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121089 - 2³ = 211121081 is a prime.

It is a super-2 number, since 2×211121089² = 89144228441091842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211121081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560544 + 105560545.

It is an arithmetic number, because the mean of its divisors is an integer number (105560545).

Almost surely, 2^211121089 is an apocalyptic number.

It is an amenable number.

211121089 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121089 is an equidigital number, since it uses as much as digits as its factorization.

211121089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 211121089 is about 14530.0065037838. The cubic root of 211121089 is about 595.4480432965.

It can be divided in two parts, 21112 and 1089, that added together give a square (22201 = 149²).

The spelling of 211121089 in words is "two hundred eleven million, one hundred twenty-one thousand, eighty-nine".