420121412129 has 2 divisors, whose sum is σ = 420121412130. Its totient is φ = 420121412128.

The previous prime is 420121412089. The next prime is 420121412173. The reversal of 420121412129 is 921214121024.

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., 224531927104 + 195589485025 = 473848^2 + 442255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420121412129 is a prime.

It is not a weakly prime, because it can be changed into another prime (420121414129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210060706064 + 210060706065.

It is an arithmetic number, because the mean of its divisors is an integer number (210060706065).

Almost surely, 2^420121412129 is an apocalyptic number.

It is an amenable number.

420121412129 is a deficient number, since it is larger than the sum of its proper divisors (1).

420121412129 is an equidigital number, since it uses as much as digits as its factorization.

420121412129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 420121412129 in words is "four hundred twenty billion, one hundred twenty-one million, four hundred twelve thousand, one hundred twenty-nine".