122102000000021 has 2 divisors, whose sum is σ = 122102000000022. Its totient is φ = 122102000000020.

The previous prime is 122102000000017. The next prime is 122102000000059. The reversal of 122102000000021 is 120000000201221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82833115612900 + 39268884387121 = 9101270^2 + 6266489^2 .

It is a cyclic number.

It is not a de Polignac number, because 122102000000021 - 2² = 122102000000017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122101999999939 and 122102000000011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122102000000921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61051000000010 + 61051000000011.

It is an arithmetic number, because the mean of its divisors is an integer number (61051000000011).

Almost surely, 2^{122102000000021} is an apocalyptic number.

It is an amenable number.

122102000000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122102000000021 is an equidigital number, since it uses as much as digits as its factorization.

122102000000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 122102000000021 its reverse (120000000201221), we get a palindrome (242102000201242).

The spelling of 122102000000021 in words is "one hundred twenty-two trillion, one hundred two billion, twenty-one", and thus it is an aban number.