12001111455 has 16 divisors (see below), whose sum is σ = 20212398720. Its totient is φ = 6063719328.

The previous prime is 12001111439. The next prime is 12001111457. The reversal of 12001111455 is 55411110021.

It is not a de Polignac number, because 12001111455 - 2⁴ = 12001111439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001111457) 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, 21054297 + ... + 21054866.

It is an arithmetic number, because the mean of its divisors is an integer number (1263274920).

Almost surely, 2^12001111455 is an apocalyptic number.

12001111455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12001111455 is a deficient number, since it is larger than the sum of its proper divisors (8211287265).

12001111455 is a wasteful number, since it uses less digits than its factorization.

12001111455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42109190.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 12001111455 its reverse (55411110021), we get a palindrome (67412221476).

The spelling of 12001111455 in words is "twelve billion, one million, one hundred eleven thousand, four hundred fifty-five".