12121221102 has 16 divisors (see below), whose sum is σ = 25668468432. Its totient is φ = 3802736000.

The previous prime is 12121221041. The next prime is 12121221103. The reversal of 12121221102 is 20112212121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121221103) 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, 59417649 + ... + 59417852.

It is an arithmetic number, because the mean of its divisors is an integer number (1604279277).

Almost surely, 2^12121221102 is an apocalyptic number.

12121221102 is an abundant number, since it is smaller than the sum of its proper divisors (13547247330).

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

12121221102 is a wasteful number, since it uses less digits than its factorization.

12121221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118835523.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12121221102 its reverse (20112212121), we get a palindrome (32233433223).

The spelling of 12121221102 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred two".