421212280946669 has 2 divisors, whose sum is σ = 421212280946670. Its totient is φ = 421212280946668.

The previous prime is 421212280946609. The next prime is 421212280946689. The reversal of 421212280946669 is 966649082212124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362411557152100 + 58800723794569 = 19037110^2 + 7668163^2 .

It is a cyclic number.

It is not a de Polignac number, because 421212280946669 - 2²⁰ = 421212279898093 is a prime.

It is a super-2 number, since 2×421212280946669² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421212280946609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210606140473334 + 210606140473335.

It is an arithmetic number, because the mean of its divisors is an integer number (210606140473335).

Almost surely, 2^{421212280946669} is an apocalyptic number.

It is an amenable number.

421212280946669 is a deficient number, since it is larger than the sum of its proper divisors (1).

421212280946669 is an equidigital number, since it uses as much as digits as its factorization.

421212280946669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35831808, while the sum is 62.

The spelling of 421212280946669 in words is "four hundred twenty-one trillion, two hundred twelve billion, two hundred eighty million, nine hundred forty-six thousand, six hundred sixty-nine".