12420452331 has 48 divisors (see below), whose sum is σ = 22664011680. Its totient is φ = 6679895040.

The previous prime is 12420452329. The next prime is 12420452339. The reversal of 12420452331 is 13325402421.

12420452331 is a `hidden beast` number, since 1 + 2 + 420 + 4 + 5 + 233 + 1 = 666.

It is not a de Polignac number, because 12420452331 - 2¹ = 12420452329 is a prime.

It is a super-2 number, since 2×12420452331² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12420452295 and 12420452304.

It is not an unprimeable number, because it can be changed into a prime (12420452339) 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, 253630 + ... + 298611.

It is an arithmetic number, because the mean of its divisors is an integer number (472166910).

Almost surely, 2^12420452331 is an apocalyptic number.

12420452331 is a deficient number, since it is larger than the sum of its proper divisors (10243559349).

12420452331 is a wasteful number, since it uses less digits than its factorization.

12420452331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552281 (or 552268 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 12420452331 its reverse (13325402421), we get a palindrome (25745854752).

The spelling of 12420452331 in words is "twelve billion, four hundred twenty million, four hundred fifty-two thousand, three hundred thirty-one".