212412091 has 2 divisors, whose sum is σ = 212412092. Its totient is φ = 212412090.

The previous prime is 212412073. The next prime is 212412097. The reversal of 212412091 is 190214212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212412091 - 2⁹ = 212411579 is a prime.

It is not a weakly prime, because it can be changed into another prime (212412097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106206045 + 106206046.

It is an arithmetic number, because the mean of its divisors is an integer number (106206046).

Almost surely, 2^212412091 is an apocalyptic number.

212412091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212412091 is an equidigital number, since it uses as much as digits as its factorization.

212412091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 212412091 is about 14574.3641713798. The cubic root of 212412091 is about 596.6592960538.

It can be divided in two parts, 21241 and 2091, that added together give a palindrome (23332).

The spelling of 212412091 in words is "two hundred twelve million, four hundred twelve thousand, ninety-one".