12121428863 has 4 divisors (see below), whose sum is σ = 12146735040. Its totient is φ = 12096122688.

The previous prime is 12121428817. The next prime is 12121428923. The reversal of 12121428863 is 36882412121.

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

It is a cyclic number.

It is not a de Polignac number, because 12121428863 - 2¹² = 12121424767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121428763) 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, 12652370 + ... + 12653327.

It is an arithmetic number, because the mean of its divisors is an integer number (3036683760).

Almost surely, 2^12121428863 is an apocalyptic number.

12121428863 is a deficient number, since it is larger than the sum of its proper divisors (25306177).

12121428863 is an equidigital number, since it uses as much as digits as its factorization.

12121428863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25306176.

The product of its digits is 36864, while the sum is 38.

The spelling of 12121428863 in words is "twelve billion, one hundred twenty-one million, four hundred twenty-eight thousand, eight hundred sixty-three".