122120987 has 2 divisors, whose sum is σ = 122120988. Its totient is φ = 122120986.

The previous prime is 122120983. The next prime is 122121017. The reversal of 122120987 is 789021221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122120987 - 2² = 122120983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122120981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060493 + 61060494.

It is an arithmetic number, because the mean of its divisors is an integer number (61060494).

Almost surely, 2^122120987 is an apocalyptic number.

122120987 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120987 is an equidigital number, since it uses as much as digits as its factorization.

122120987 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 32.

The square root of 122120987 is about 11050.8364841762. The cubic root of 122120987 is about 496.1314620211.

The spelling of 122120987 in words is "one hundred twenty-two million, one hundred twenty thousand, nine hundred eighty-seven".