421770126121 has 2 divisors, whose sum is σ = 421770126122. Its totient is φ = 421770126120.

The previous prime is 421770126077. The next prime is 421770126199. The reversal of 421770126121 is 121621077124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279667514896 + 142102611225 = 528836^2 + 376965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421770126121 is a prime.

It is not a weakly prime, because it can be changed into another prime (421770126521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210885063060 + 210885063061.

It is an arithmetic number, because the mean of its divisors is an integer number (210885063061).

Almost surely, 2^421770126121 is an apocalyptic number.

It is an amenable number.

421770126121 is a deficient number, since it is larger than the sum of its proper divisors (1).

421770126121 is an equidigital number, since it uses as much as digits as its factorization.

421770126121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The spelling of 421770126121 in words is "four hundred twenty-one billion, seven hundred seventy million, one hundred twenty-six thousand, one hundred twenty-one".