212002122091 has 2 divisors, whose sum is σ = 212002122092. Its totient is φ = 212002122090.

The previous prime is 212002122089. The next prime is 212002122109. The reversal of 212002122091 is 190221200212.

Together with next prime (212002122109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212002122091 - 2¹ = 212002122089 is a prime.

Together with 212002122089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212002122791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001061045 + 106001061046.

It is an arithmetic number, because the mean of its divisors is an integer number (106001061046).

Almost surely, 2^212002122091 is an apocalyptic number.

212002122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212002122091 is an equidigital number, since it uses as much as digits as its factorization.

212002122091 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 spelling of 212002122091 in words is "two hundred twelve billion, two million, one hundred twenty-two thousand, ninety-one".