12052123531 has 32 divisors (see below), whose sum is σ = 14706413568. Its totient is φ = 9641548800.

The previous prime is 12052123519. The next prime is 12052123619. The reversal of 12052123531 is 13532125021.

It is a cyclic number.

It is not a de Polignac number, because 12052123531 - 2⁷ = 12052123403 is a prime.

It is a super-2 number, since 2×12052123531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12052123496 and 12052123505.

It is not an unprimeable number, because it can be changed into a prime (12052123631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8305356 + ... + 8306806.

It is an arithmetic number, because the mean of its divisors is an integer number (459575424).

Almost surely, 2^12052123531 is an apocalyptic number.

12052123531 is a deficient number, since it is larger than the sum of its proper divisors (2654290037).

12052123531 is a wasteful number, since it uses less digits than its factorization.

12052123531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 12052123531 its reverse (13532125021), we get a palindrome (25584248552).

The spelling of 12052123531 in words is "twelve billion, fifty-two million, one hundred twenty-three thousand, five hundred thirty-one".