421440121431 has 48 divisors (see below), whose sum is σ = 701390536704. Its totient is φ = 238857921792.

The previous prime is 421440121423. The next prime is 421440121433. The reversal of 421440121431 is 134121044124.

421440121431 is a `hidden beast` number, since 4 + 2 + 1 + 440 + 1 + 214 + 3 + 1 = 666.

It is not a de Polignac number, because 421440121431 - 2³ = 421440121423 is a prime.

It is a super-2 number, since 2×421440121431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421440121395 and 421440121404.

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 47 ways as a sum of consecutive naturals, for example, 43144510 + ... + 43154276.

It is an arithmetic number, because the mean of its divisors is an integer number (14612302848).

Almost surely, 2^421440121431 is an apocalyptic number.

421440121431 is a deficient number, since it is larger than the sum of its proper divisors (279950415273).

421440121431 is a wasteful number, since it uses less digits than its factorization.

421440121431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15300 (or 15297 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 421440121431 its reverse (134121044124), we get a palindrome (555561165555).

The spelling of 421440121431 in words is "four hundred twenty-one billion, four hundred forty million, one hundred twenty-one thousand, four hundred thirty-one".