122120120021 has 2 divisors, whose sum is σ = 122120120022. Its totient is φ = 122120120020.

The previous prime is 122120120011. The next prime is 122120120039. The reversal of 122120120021 is 120021021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77220628996 + 44899491025 = 277886^2 + 211895^2 .

It is a cyclic number.

It is not a de Polignac number, because 122120120021 - 2³⁰ = 121046378197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122120119978 and 122120120005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122120120011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060060010 + 61060060011.

It is an arithmetic number, because the mean of its divisors is an integer number (61060060011).

Almost surely, 2^122120120021 is an apocalyptic number.

It is an amenable number.

122120120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120120021 is an equidigital number, since it uses as much as digits as its factorization.

122120120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 122120120021 its reverse (120021021221), we get a palindrome (242141141242).

The spelling of 122120120021 in words is "one hundred twenty-two billion, one hundred twenty million, one hundred twenty thousand, twenty-one".