212231132209 has 2 divisors, whose sum is σ = 212231132210. Its totient is φ = 212231132208.

The previous prime is 212231132177. The next prime is 212231132221. The reversal of 212231132209 is 902231132212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156062132209 + 56169000000 = 395047^2 + 237000^2 .

It is a cyclic number.

It is not a de Polignac number, because 212231132209 - 2⁵ = 212231132177 is a prime.

It is not a weakly prime, because it can be changed into another prime (212231132279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106115566104 + 106115566105.

It is an arithmetic number, because the mean of its divisors is an integer number (106115566105).

Almost surely, 2^212231132209 is an apocalyptic number.

It is an amenable number.

212231132209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212231132209 is an equidigital number, since it uses as much as digits as its factorization.

212231132209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 212231132209 in words is "two hundred twelve billion, two hundred thirty-one million, one hundred thirty-two thousand, two hundred nine".