12510423721 has 8 divisors (see below), whose sum is σ = 12702602304. Its totient is φ = 12318689040.

The previous prime is 12510423719. The next prime is 12510423797. The reversal of 12510423721 is 12732401521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12510423721 - 2¹ = 12510423719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12510423721.

It is not an unprimeable number, because it can be changed into a prime (12510423701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53955 + ... + 167128.

It is an arithmetic number, because the mean of its divisors is an integer number (1587825288).

Almost surely, 2^12510423721 is an apocalyptic number.

It is an amenable number.

12510423721 is a deficient number, since it is larger than the sum of its proper divisors (192178583).

12510423721 is an equidigital number, since it uses as much as digits as its factorization.

12510423721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221951.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 12510423721 in words is "twelve billion, five hundred ten million, four hundred twenty-three thousand, seven hundred twenty-one".