421029212869 has 2 divisors, whose sum is σ = 421029212870. Its totient is φ = 421029212868.

The previous prime is 421029212819. The next prime is 421029212941. The reversal of 421029212869 is 968212920124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353652627969 + 67376584900 = 594687^2 + 259570^2 .

It is a cyclic number.

It is not a de Polignac number, because 421029212869 - 2²⁵ = 420995658437 is a prime.

It is a super-2 number, since 2×421029212869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421029212819) 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, 210514606434 + 210514606435.

It is an arithmetic number, because the mean of its divisors is an integer number (210514606435).

Almost surely, 2^421029212869 is an apocalyptic number.

It is an amenable number.

421029212869 is a deficient number, since it is larger than the sum of its proper divisors (1).

421029212869 is an equidigital number, since it uses as much as digits as its factorization.

421029212869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 421029212869 in words is "four hundred twenty-one billion, twenty-nine million, two hundred twelve thousand, eight hundred sixty-nine".