123212213191 has 2 divisors, whose sum is σ = 123212213192. Its totient is φ = 123212213190.

The previous prime is 123212213183. The next prime is 123212213221. The reversal of 123212213191 is 191312212321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123212213191 - 2³ = 123212213183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123212213491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61606106595 + 61606106596.

It is an arithmetic number, because the mean of its divisors is an integer number (61606106596).

Almost surely, 2^123212213191 is an apocalyptic number.

123212213191 is a deficient number, since it is larger than the sum of its proper divisors (1).

123212213191 is an equidigital number, since it uses as much as digits as its factorization.

123212213191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The spelling of 123212213191 in words is "one hundred twenty-three billion, two hundred twelve million, two hundred thirteen thousand, one hundred ninety-one".