122120111987 has 2 divisors, whose sum is σ = 122120111988. Its totient is φ = 122120111986.

The previous prime is 122120111957. The next prime is 122120112007. The reversal of 122120111987 is 789111021221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122120111987 - 2³⁶ = 53400635251 is a prime.

It is not a weakly prime, because it can be changed into another prime (122120111957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060055993 + 61060055994.

It is an arithmetic number, because the mean of its divisors is an integer number (61060055994).

Almost surely, 2^122120111987 is an apocalyptic number.

122120111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120111987 is an equidigital number, since it uses as much as digits as its factorization.

122120111987 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 35.

The spelling of 122120111987 in words is "one hundred twenty-two billion, one hundred twenty million, one hundred eleven thousand, nine hundred eighty-seven".