122001121987 has 2 divisors, whose sum is σ = 122001121988. Its totient is φ = 122001121986.

The previous prime is 122001121981. The next prime is 122001122003. The reversal of 122001121987 is 789121100221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122001121987 is a prime.

It is not a weakly prime, because it can be changed into another prime (122001121981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61000560993 + 61000560994.

It is an arithmetic number, because the mean of its divisors is an integer number (61000560994).

Almost surely, 2^122001121987 is an apocalyptic number.

122001121987 is a deficient number, since it is larger than the sum of its proper divisors (1).

122001121987 is an equidigital number, since it uses as much as digits as its factorization.

122001121987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 122001121987 in words is "one hundred twenty-two billion, one million, one hundred twenty-one thousand, nine hundred eighty-seven".