122120199989 has 2 divisors, whose sum is σ = 122120199990. Its totient is φ = 122120199988.

The previous prime is 122120199913. The next prime is 122120200087. The reversal of 122120199989 is 989991021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85604811889 + 36515388100 = 292583^2 + 191090^2 .

It is a cyclic number.

It is not a de Polignac number, because 122120199989 - 2¹² = 122120195893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122120199989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122120199389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060099994 + 61060099995.

It is an arithmetic number, because the mean of its divisors is an integer number (61060099995).

Almost surely, 2^122120199989 is an apocalyptic number.

It is an amenable number.

122120199989 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120199989 is an equidigital number, since it uses as much as digits as its factorization.

122120199989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 53.

The spelling of 122120199989 in words is "one hundred twenty-two billion, one hundred twenty million, one hundred ninety-nine thousand, nine hundred eighty-nine".