12348321129 has 15 divisors (see below), whose sum is σ = 18447751597. Its totient is φ = 8231547348.

The previous prime is 12348321119. The next prime is 12348321143. The reversal of 12348321129 is 92112384321.

The square root of 12348321129 is 111123.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 12348321129 - 2¹³ = 12348312937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12348321093 and 12348321102.

It is not an unprimeable number, because it can be changed into a prime (12348321119) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 993934 + ... + 1006280.

Almost surely, 2^12348321129 is an apocalyptic number.

12348321129 is the 111123-rd square number.

12348321129 is the 55562-nd centered octagonal number.

It is an amenable number.

12348321129 is a deficient number, since it is larger than the sum of its proper divisors (6099430468).

12348321129 is an frugal number, since it uses more digits than its factorization.

12348321129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24706 (or 12350 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

Multiplying 12348321129 by its sum of digits (36), we get a square (444539560644 = 666738²).

Multiplying 12348321129 by its product of digits (20736), we get a square (256054786930944 = 16001712²).

The spelling of 12348321129 in words is "twelve billion, three hundred forty-eight million, three hundred twenty-one thousand, one hundred twenty-nine".