421006128467 has 2 divisors, whose sum is σ = 421006128468. Its totient is φ = 421006128466.

The previous prime is 421006128457. The next prime is 421006128469. The reversal of 421006128467 is 764821600124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421006128467 - 2³⁴ = 403826259283 is a prime.

Together with 421006128469, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421006128469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210503064233 + 210503064234.

It is an arithmetic number, because the mean of its divisors is an integer number (210503064234).

Almost surely, 2^421006128467 is an apocalyptic number.

421006128467 is a deficient number, since it is larger than the sum of its proper divisors (1).

421006128467 is an equidigital number, since it uses as much as digits as its factorization.

421006128467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 421006128467 in words is "four hundred twenty-one billion, six million, one hundred twenty-eight thousand, four hundred sixty-seven".