12123632121 has 8 divisors (see below), whose sum is σ = 16601730624. Its totient is φ = 7863977520.

The previous prime is 12123632099. The next prime is 12123632141.

12123632121 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 12123632121 - 2⁹ = 12123631609 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 12123632091 and 12123632100.

It is not an unprimeable number, because it can be changed into a prime (12123632141) 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, 54610845 + ... + 54611066.

It is an arithmetic number, because the mean of its divisors is an integer number (2075216328).

Almost surely, 2^12123632121 is an apocalyptic number.

It is an amenable number.

12123632121 is a deficient number, since it is larger than the sum of its proper divisors (4478098503).

12123632121 is a wasteful number, since it uses less digits than its factorization.

12123632121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109221951.

The product of its digits is 864, while the sum is 24.

The spelling of 12123632121 in words is "twelve billion, one hundred twenty-three million, six hundred thirty-two thousand, one hundred twenty-one".