421212280946687 has 4 divisors (see below), whose sum is σ = 421256801861016. Its totient is φ = 421167760032360.

The previous prime is 421212280946669. The next prime is 421212280946689. The reversal of 421212280946687 is 786649082212124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421212280946687 - 2⁴² = 416814234435583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421212280946689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22260442973 + ... + 22260461894.

It is an arithmetic number, because the mean of its divisors is an integer number (105314200465254).

Almost surely, 2^{421212280946687} is an apocalyptic number.

421212280946687 is a deficient number, since it is larger than the sum of its proper divisors (44520914329).

421212280946687 is an equidigital number, since it uses as much as digits as its factorization.

421212280946687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44520914328.

The product of its (nonzero) digits is 37158912, while the sum is 62.

The spelling of 421212280946687 in words is "four hundred twenty-one trillion, two hundred twelve billion, two hundred eighty million, nine hundred forty-six thousand, six hundred eighty-seven".