421231421532 has 24 divisors (see below), whose sum is σ = 1014578908672. Its totient is φ = 135881103600.

The previous prime is 421231421531. The next prime is 421231421543. The reversal of 421231421532 is 235124132124.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 421231421532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421231421531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566170894 + ... + 566171637.

Almost surely, 2^421231421532 is an apocalyptic number.

It is an amenable number.

421231421532 is an abundant number, since it is smaller than the sum of its proper divisors (593347487140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421231421532 is a wasteful number, since it uses less digits than its factorization.

421231421532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132342569 (or 1132342567 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 421231421532 its reverse (235124132124), we get a palindrome (656355553656).

The spelling of 421231421532 in words is "four hundred twenty-one billion, two hundred thirty-one million, four hundred twenty-one thousand, five hundred thirty-two".