122120191819 has 2 divisors, whose sum is σ = 122120191820. Its totient is φ = 122120191818.

The previous prime is 122120191807. The next prime is 122120191867. The reversal of 122120191819 is 918191021221.

It is a weak prime.

It is an emirp because it is prime and its reverse (918191021221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122120191819 - 2¹⁹ = 122119667531 is a prime.

It is a super-2 number, since 2×122120191819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122120191889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060095909 + 61060095910.

It is an arithmetic number, because the mean of its divisors is an integer number (61060095910).

Almost surely, 2^122120191819 is an apocalyptic number.

122120191819 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120191819 is an equidigital number, since it uses as much as digits as its factorization.

122120191819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 122120191819 in words is "one hundred twenty-two billion, one hundred twenty million, one hundred ninety-one thousand, eight hundred nineteen".