122550640987 has 2 divisors, whose sum is σ = 122550640988. Its totient is φ = 122550640986.

The previous prime is 122550640981. The next prime is 122550641039. The reversal of 122550640987 is 789046055221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122550640987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122550640987.

It is not a weakly prime, because it can be changed into another prime (122550640981) 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, 61275320493 + 61275320494.

It is an arithmetic number, because the mean of its divisors is an integer number (61275320494).

Almost surely, 2^122550640987 is an apocalyptic number.

122550640987 is a deficient number, since it is larger than the sum of its proper divisors (1).

122550640987 is an equidigital number, since it uses as much as digits as its factorization.

122550640987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 122550640987 in words is "one hundred twenty-two billion, five hundred fifty million, six hundred forty thousand, nine hundred eighty-seven".