421440121432 has 32 divisors (see below), whose sum is σ = 883061902800. Its totient is φ = 186891404800.

The previous prime is 421440121423. The next prime is 421440121433. The reversal of 421440121432 is 234121044124.

It is a super-2 number, since 2×421440121432² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421440121432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421440121433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58399957 + ... + 58407172.

Almost surely, 2^421440121432 is an apocalyptic number.

It is an amenable number.

421440121432 is an abundant number, since it is smaller than the sum of its proper divisors (461621781368).

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

421440121432 is a wasteful number, since it uses less digits than its factorization.

421440121432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116807187 (or 116807183 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 421440121432 its reverse (234121044124), we get a palindrome (655561165556).

The spelling of 421440121432 in words is "four hundred twenty-one billion, four hundred forty million, one hundred twenty-one thousand, four hundred thirty-two".