12532240421 has 4 divisors (see below), whose sum is σ = 13269431052. Its totient is φ = 11795049792.

The previous prime is 12532240403. The next prime is 12532240433. The reversal of 12532240421 is 12404223521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12404223521 = 97 ⋅127878593.

It can be written as a sum of positive squares in 2 ways, for example, as 11006947396 + 1525293025 = 104914^2 + 39055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12532240421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12532240121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368595290 + ... + 368595323.

It is an arithmetic number, because the mean of its divisors is an integer number (3317357763).

Almost surely, 2^12532240421 is an apocalyptic number.

It is an amenable number.

12532240421 is a deficient number, since it is larger than the sum of its proper divisors (737190631).

12532240421 is an equidigital number, since it uses as much as digits as its factorization.

12532240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737190630.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12532240421 its reverse (12404223521), we get a palindrome (24936463942).

The spelling of 12532240421 in words is "twelve billion, five hundred thirty-two million, two hundred forty thousand, four hundred twenty-one".