421212280946689 has 2 divisors, whose sum is σ = 421212280946690. Its totient is φ = 421212280946688.

The previous prime is 421212280946669. The next prime is 421212280946707. The reversal of 421212280946689 is 986649082212124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255869072744464 + 165343208202225 = 15995908^2 + 12858585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421212280946689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421212280946689.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210606140473344 + 210606140473345.

It is an arithmetic number, because the mean of its divisors is an integer number (210606140473345).

Almost surely, 2^{421212280946689} is an apocalyptic number.

It is an amenable number.

421212280946689 is a deficient number, since it is larger than the sum of its proper divisors (1).

421212280946689 is an equidigital number, since it uses as much as digits as its factorization.

421212280946689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47775744, while the sum is 64.

The spelling of 421212280946689 in words is "four hundred twenty-one trillion, two hundred twelve billion, two hundred eighty million, nine hundred forty-six thousand, six hundred eighty-nine".