212261171 has 2 divisors, whose sum is σ = 212261172. Its totient is φ = 212261170.

The previous prime is 212261149. The next prime is 212261177. The reversal of 212261171 is 171162212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212261171 - 2²² = 208066867 is a prime.

It is not a weakly prime, because it can be changed into another prime (212261177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106130585 + 106130586.

It is an arithmetic number, because the mean of its divisors is an integer number (106130586).

Almost surely, 2^212261171 is an apocalyptic number.

212261171 is a deficient number, since it is larger than the sum of its proper divisors (1).

212261171 is an equidigital number, since it uses as much as digits as its factorization.

212261171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

The square root of 212261171 is about 14569.1856670165. The cubic root of 212261171 is about 596.5179526311.

The spelling of 212261171 in words is "two hundred twelve million, two hundred sixty-one thousand, one hundred seventy-one".