122040402091 has 2 divisors, whose sum is σ = 122040402092. Its totient is φ = 122040402090.

The previous prime is 122040402089. The next prime is 122040402137. The reversal of 122040402091 is 190204040221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122040402091 - 2¹ = 122040402089 is a prime.

Together with 122040402089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (122040402031) 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, 61020201045 + 61020201046.

It is an arithmetic number, because the mean of its divisors is an integer number (61020201046).

Almost surely, 2^122040402091 is an apocalyptic number.

122040402091 is a deficient number, since it is larger than the sum of its proper divisors (1).

122040402091 is an equidigital number, since it uses as much as digits as its factorization.

122040402091 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 25.

The spelling of 122040402091 in words is "one hundred twenty-two billion, forty million, four hundred two thousand, ninety-one".