122012000021 has 2 divisors, whose sum is σ = 122012000022. Its totient is φ = 122012000020.

The previous prime is 122011999969. The next prime is 122012000027. The reversal of 122012000021 is 120000210221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93690475921 + 28321524100 = 306089^2 + 168290^2 .

It is a cyclic number.

It is not a de Polignac number, because 122012000021 - 2¹⁸ = 122011737877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122011999966 and 122012000011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122012000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61006000010 + 61006000011.

It is an arithmetic number, because the mean of its divisors is an integer number (61006000011).

Almost surely, 2^122012000021 is an apocalyptic number.

It is an amenable number.

122012000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122012000021 is an equidigital number, since it uses as much as digits as its factorization.

122012000021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 122012000021 its reverse (120000210221), we get a palindrome (242012210242).

The spelling of 122012000021 in words is "one hundred twenty-two billion, twelve million, twenty-one", and thus it is an aban number.