12000121002 has 48 divisors (see below), whose sum is σ = 27045057312. Its totient is φ = 3987902160.

The previous prime is 12000120931. The next prime is 12000121031. The reversal of 12000121002 is 20012100021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123568 + ... + 198164.

It is an arithmetic number, because the mean of its divisors is an integer number (563438694).

Almost surely, 2^12000121002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12000121002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13522528656).

12000121002 is an abundant number, since it is smaller than the sum of its proper divisors (15044936310).

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

12000121002 is an equidigital number, since it uses as much as digits as its factorization.

12000121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74945 (or 74933 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12000121002 its reverse (20012100021), we get a palindrome (32012221023).

The spelling of 12000121002 in words is "twelve billion, one hundred twenty-one thousand, two".