12001201222123 has 4 divisors (see below), whose sum is σ = 12029843707560. Its totient is φ = 11972558736688.

The previous prime is 12001201222117. The next prime is 12001201222189. The reversal of 12001201222123 is 32122210210021.

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 12001201222123 - 2¹³ = 12001201213931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12001201222123.

It is not an unprimeable number, because it can be changed into a prime (12001201220123) 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, 14321242090 + ... + 14321242927.

It is an arithmetic number, because the mean of its divisors is an integer number (3007460926890).

Almost surely, 2^{12001201222123} is an apocalyptic number.

12001201222123 is a deficient number, since it is larger than the sum of its proper divisors (28642485437).

12001201222123 is an equidigital number, since it uses as much as digits as its factorization.

12001201222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28642485436.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12001201222123 its reverse (32122210210021), we get a palindrome (44123411432144).

The spelling of 12001201222123 in words is "twelve trillion, one billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-three".