212212051 has 2 divisors, whose sum is σ = 212212052. Its totient is φ = 212212050.

The previous prime is 212211997. The next prime is 212212069. The reversal of 212212051 is 150212212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212212051 is a prime.

It is not a weakly prime, because it can be changed into another prime (212212151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106025 + 106106026.

It is an arithmetic number, because the mean of its divisors is an integer number (106106026).

Almost surely, 2^212212051 is an apocalyptic number.

212212051 is a deficient number, since it is larger than the sum of its proper divisors (1).

212212051 is an equidigital number, since it uses as much as digits as its factorization.

212212051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 212212051 is about 14567.4998198044. The cubic root of 212212051 is about 596.4719350730.

Adding to 212212051 its reverse (150212212), we get a palindrome (362424263).

The spelling of 212212051 in words is "two hundred twelve million, two hundred twelve thousand, fifty-one".