12501320531 has 4 divisors (see below), whose sum is σ = 14287223472. Its totient is φ = 10715417592.

The previous prime is 12501320519. The next prime is 12501320543. The reversal of 12501320531 is 13502310521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12501320519) and next prime (12501320543).

It is a cyclic number.

It is not a de Polignac number, because 12501320531 - 2⁶ = 12501320467 is a prime.

It is a super-2 number, since 2×12501320531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12501320497 and 12501320506.

It is not an unprimeable number, because it can be changed into a prime (12501320501) 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, 892951460 + ... + 892951473.

It is an arithmetic number, because the mean of its divisors is an integer number (3571805868).

Almost surely, 2^12501320531 is an apocalyptic number.

12501320531 is a deficient number, since it is larger than the sum of its proper divisors (1785902941).

12501320531 is an equidigital number, since it uses as much as digits as its factorization.

12501320531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785902940.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 12501320531 in words is "twelve billion, five hundred one million, three hundred twenty thousand, five hundred thirty-one".