421544721212 has 24 divisors (see below), whose sum is σ = 740749741200. Its totient is φ = 209902582656.

The previous prime is 421544721209. The next prime is 421544721251. The reversal of 421544721212 is 212127445124.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2581739 + ... + 2740157.

It is an arithmetic number, because the mean of its divisors is an integer number (30864572550).

Almost surely, 2^421544721212 is an apocalyptic number.

It is an amenable number.

421544721212 is a deficient number, since it is larger than the sum of its proper divisors (319205019988).

421544721212 is a wasteful number, since it uses less digits than its factorization.

421544721212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161165 (or 161163 counting only the distinct ones).

The product of its digits is 35840, while the sum is 35.

The spelling of 421544721212 in words is "four hundred twenty-one billion, five hundred forty-four million, seven hundred twenty-one thousand, two hundred twelve".