421563505111 has 12 divisors (see below), whose sum is σ = 490400937768. Its totient is φ = 361332235152.

The previous prime is 421563505109. The next prime is 421563505123. The reversal of 421563505111 is 111505365124.

It is not a de Polignac number, because 421563505111 - 2¹ = 421563505109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421563505171) 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 in 11 ways as a sum of consecutive naturals, for example, 3756760 + ... + 3867346.

It is an arithmetic number, because the mean of its divisors is an integer number (40866744814).

Almost surely, 2^421563505111 is an apocalyptic number.

421563505111 is a deficient number, since it is larger than the sum of its proper divisors (68837432657).

421563505111 is a wasteful number, since it uses less digits than its factorization.

421563505111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188398 (or 188391 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 421563505111 in words is "four hundred twenty-one billion, five hundred sixty-three million, five hundred five thousand, one hundred eleven".