122208273889 has 9 divisors (see below), whose sum is σ = 132336957459. Its totient is φ = 112803442440.

The previous prime is 122208273827. The next prime is 122208273937. The reversal of 122208273889 is 988372802221.

The square root of 122208273889 is 349583.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18078147025 + 104130126864 = 134455^2 + 322692^2 .

It is not a de Polignac number, because 122208273889 - 2²³ = 122199885281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122208277889) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4531134 + ... + 4558024.

Almost surely, 2^122208273889 is an apocalyptic number.

122208273889 is the 349583-rd square number.

122208273889 is the 174792-nd centered octagonal number.

It is an amenable number.

122208273889 is a deficient number, since it is larger than the sum of its proper divisors (10128683570).

122208273889 is an frugal number, since it uses more digits than its factorization.

122208273889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53808 (or 26904 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 122208273889 in words is "one hundred twenty-two billion, two hundred eight million, two hundred seventy-three thousand, eight hundred eighty-nine".