12001112020 has 12 divisors (see below), whose sum is σ = 25202335284. Its totient is φ = 4800444800.

The previous prime is 12001111981. The next prime is 12001112051. The reversal of 12001112020 is 2021110021.

It can be written as a sum of positive squares in 2 ways, for example, as 3932042436 + 8069069584 = 62706^2 + 89828^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12001111988 and 12001112006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300027781 + ... + 300027820.

It is an arithmetic number, because the mean of its divisors is an integer number (2100194607).

Almost surely, 2^12001112020 is an apocalyptic number.

12001112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001112020 is an abundant number, since it is smaller than the sum of its proper divisors (13201223264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001112020 is a wasteful number, since it uses less digits than its factorization.

12001112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600055610 (or 600055608 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12001112020 its reverse (2021110021), we get a palindrome (14022222041).

The spelling of 12001112020 in words is "twelve billion, one million, one hundred twelve thousand, twenty".