212112169 has 2 divisors, whose sum is σ = 212112170. Its totient is φ = 212112168.

The previous prime is 212112167. The next prime is 212112223. The reversal of 212112169 is 961211212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211411600 + 700569 = 14540^2 + 837^2 .

It is a cyclic number.

It is not a de Polignac number, because 212112169 - 2¹ = 212112167 is a prime.

It is a super-2 number, since 2×212112169² = 89983144475769122, which contains 22 as substring.

Together with 212112167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212112161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056084 + 106056085.

It is an arithmetic number, because the mean of its divisors is an integer number (106056085).

Almost surely, 2^212112169 is an apocalyptic number.

It is an amenable number.

212112169 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112169 is an equidigital number, since it uses as much as digits as its factorization.

212112169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The square root of 212112169 is about 14564.0711684611. The cubic root of 212112169 is about 596.3783397611.

The spelling of 212112169 in words is "two hundred twelve million, one hundred twelve thousand, one hundred sixty-nine".