12201145123 has 16 divisors (see below), whose sum is σ = 13576606560. Its totient is φ = 10913204736.

The previous prime is 12201145093. The next prime is 12201145139. The reversal of 12201145123 is 32154110221.

It is a cyclic number.

It is not a de Polignac number, because 12201145123 - 2⁵ = 12201145091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201145094 and 12201145103.

It is not an unprimeable number, because it can be changed into a prime (12201145183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198508 + ... + 252601.

It is an arithmetic number, because the mean of its divisors is an integer number (848537910).

Almost surely, 2^12201145123 is an apocalyptic number.

12201145123 is a deficient number, since it is larger than the sum of its proper divisors (1375461437).

12201145123 is a wasteful number, since it uses less digits than its factorization.

12201145123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451206.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 12201145123 its reverse (32154110221), we get a palindrome (44355255344).

The spelling of 12201145123 in words is "twelve billion, two hundred one million, one hundred forty-five thousand, one hundred twenty-three".