212122122112091 has 2 divisors, whose sum is σ = 212122122112092. Its totient is φ = 212122122112090.

The previous prime is 212122122112073. The next prime is 212122122112139. The reversal of 212122122112091 is 190211221221212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212122122112091 is a prime.

It is not a weakly prime, because it can be changed into another prime (212122122102091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061061056045 + 106061061056046.

It is an arithmetic number, because the mean of its divisors is an integer number (106061061056046).

Almost surely, 2^{212122122112091} is an apocalyptic number.

212122122112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212122122112091 is an equidigital number, since it uses as much as digits as its factorization.

212122122112091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 212122122112091 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred twelve thousand, ninety-one".