12158321683 has 4 divisors (see below), whose sum is σ = 12158588808. Its totient is φ = 12158054560.

The previous prime is 12158321641. The next prime is 12158321713. The reversal of 12158321683 is 38612385121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12158321683 is a prime.

It is a super-2 number, since 2×12158321683² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12158321603) 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, 46273 + ... + 162658.

It is an arithmetic number, because the mean of its divisors is an integer number (3039647202).

Almost surely, 2^12158321683 is an apocalyptic number.

12158321683 is a deficient number, since it is larger than the sum of its proper divisors (267125).

12158321683 is an equidigital number, since it uses as much as digits as its factorization.

12158321683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267124.

The product of its digits is 69120, while the sum is 40.

The spelling of 12158321683 in words is "twelve billion, one hundred fifty-eight million, three hundred twenty-one thousand, six hundred eighty-three".