122120199913 has 2 divisors, whose sum is σ = 122120199914. Its totient is φ = 122120199912.

The previous prime is 122120199833. The next prime is 122120199989. The reversal of 122120199913 is 319991021221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88368263824 + 33751936089 = 297268^2 + 183717^2 .

It is an emirp because it is prime and its reverse (319991021221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122120199913 is a prime.

It is not a weakly prime, because it can be changed into another prime (122120199413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060099956 + 61060099957.

It is an arithmetic number, because the mean of its divisors is an integer number (61060099957).

Almost surely, 2^122120199913 is an apocalyptic number.

It is an amenable number.

122120199913 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120199913 is an equidigital number, since it uses as much as digits as its factorization.

122120199913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 40.

The spelling of 122120199913 in words is "one hundred twenty-two billion, one hundred twenty million, one hundred ninety-nine thousand, nine hundred thirteen".