122121201091 has 2 divisors, whose sum is σ = 122121201092. Its totient is φ = 122121201090.

The previous prime is 122121201089. The next prime is 122121201101. The reversal of 122121201091 is 190102121221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122121201091 - 2¹ = 122121201089 is a prime.

Together with 122121201089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (122121201001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060600545 + 61060600546.

It is an arithmetic number, because the mean of its divisors is an integer number (61060600546).

Almost surely, 2^122121201091 is an apocalyptic number.

122121201091 is a deficient number, since it is larger than the sum of its proper divisors (1).

122121201091 is an equidigital number, since it uses as much as digits as its factorization.

122121201091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 122121201091 in words is "one hundred twenty-two billion, one hundred twenty-one million, two hundred one thousand, ninety-one".