212212151 has 2 divisors, whose sum is σ = 212212152. Its totient is φ = 212212150.

The previous prime is 212212141. The next prime is 212212177. The reversal of 212212151 is 151212212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212212151 - 2¹⁰ = 212211127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212212141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106075 + 106106076.

It is an arithmetic number, because the mean of its divisors is an integer number (106106076).

Almost surely, 2^212212151 is an apocalyptic number.

212212151 is a deficient number, since it is larger than the sum of its proper divisors (1).

212212151 is an equidigital number, since it uses as much as digits as its factorization.

212212151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 17.

The square root of 212212151 is about 14567.5032521019. The cubic root of 212212151 is about 596.4720287642.

Adding to 212212151 its reverse (151212212), we get a palindrome (363424363).

The spelling of 212212151 in words is "two hundred twelve million, two hundred twelve thousand, one hundred fifty-one".