12001203234531 has 48 divisors (see below), whose sum is σ = 20979230171328. Its totient is φ = 6453709516800.

The previous prime is 12001203234523. The next prime is 12001203234577. The reversal of 12001203234531 is 13543230210021.

12001203234531 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 1 + 203 + 2 + 3 + 453 + 1 = 666.

It is not a de Polignac number, because 12001203234531 - 2³ = 12001203234523 is a prime.

It is a super-2 number, since 2×12001203234531² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12001203234495 and 12001203234504.

It is not an unprimeable number, because it can be changed into a prime (12001203234521) 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, 9063201 + ... + 10302621.

It is an arithmetic number, because the mean of its divisors is an integer number (437067295236).

Almost surely, 2^{12001203234531} is an apocalyptic number.

12001203234531 is a deficient number, since it is larger than the sum of its proper divisors (8978026936797).

12001203234531 is a wasteful number, since it uses less digits than its factorization.

12001203234531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248492 (or 1248489 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 12001203234531 its reverse (13543230210021), we get a palindrome (25544433444552).

The spelling of 12001203234531 in words is "twelve trillion, one billion, two hundred three million, two hundred thirty-four thousand, five hundred thirty-one".