12001020112005 has 32 divisors (see below), whose sum is σ = 19486050249600. Its totient is φ = 6306394136832.

The previous prime is 12001020111943. The next prime is 12001020112057. The reversal of 12001020112005 is 50021102010021.

It is not a de Polignac number, because 12001020112005 - 2⁷ = 12001020111877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20210334 + ... + 20795663.

It is an arithmetic number, because the mean of its divisors is an integer number (608939070300).

Almost surely, 2^{12001020112005} is an apocalyptic number.

12001020112005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12001020112005 is a deficient number, since it is larger than the sum of its proper divisors (7485030137595).

12001020112005 is a wasteful number, since it uses less digits than its factorization.

12001020112005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41006293.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 12001020112005 its reverse (50021102010021), we get a palindrome (62022122122026).

The spelling of 12001020112005 in words is "twelve trillion, one billion, twenty million, one hundred twelve thousand, five".