12121021002 has 16 divisors (see below), whose sum is σ = 24243694560. Its totient is φ = 4040064912.

The previous prime is 12121021001. The next prime is 12121021007. The reversal of 12121021002 is 20012012121.

It is not an unprimeable number, because it can be changed into a prime (12121021001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39649 + ... + 160667.

It is an arithmetic number, because the mean of its divisors is an integer number (1515230910).

Almost surely, 2^12121021002 is an apocalyptic number.

12121021002 is an abundant number, since it is smaller than the sum of its proper divisors (12122673558).

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

12121021002 is a wasteful number, since it uses less digits than its factorization.

12121021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137717.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12121021002 its reverse (20012012121), we get a palindrome (32133033123).

The spelling of 12121021002 in words is "twelve billion, one hundred twenty-one million, twenty-one thousand, two".