12121110123 has 8 divisors (see below), whose sum is σ = 16466413968. Its totient is φ = 7928273184.

The previous prime is 12121110061. The next prime is 12121110137. The reversal of 12121110123 is 32101112121.

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

It is not a de Polignac number, because 12121110123 - 2¹² = 12121106027 is a prime.

It is a super-2 number, since 2×12121110123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121110523) 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, 38116540 + ... + 38116857.

It is an arithmetic number, because the mean of its divisors is an integer number (2058301746).

Almost surely, 2^12121110123 is an apocalyptic number.

12121110123 is a deficient number, since it is larger than the sum of its proper divisors (4345303845).

12121110123 is an equidigital number, since it uses as much as digits as its factorization.

12121110123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76233453.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12121110123 its reverse (32101112121), we get a palindrome (44222222244).

The spelling of 12121110123 in words is "twelve billion, one hundred twenty-one million, one hundred ten thousand, one hundred twenty-three".