12121122220000 has 60 divisors (see below), whose sum is σ = 29819778878736. Its totient is φ = 4848448880000.

The previous prime is 12121122219971. The next prime is 12121122220003. The reversal of 12121122220000 is 2222112121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121122220003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 303008056 + ... + 303048055.

Almost surely, 2^{12121122220000} is an apocalyptic number.

12121122220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121122220000 is an abundant number, since it is smaller than the sum of its proper divisors (17698656658736).

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

12121122220000 is an frugal number, since it uses more digits than its factorization.

12121122220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606056141 (or 606056118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12121122220000 its reverse (2222112121), we get a palindrome (12123344332121).

The spelling of 12121122220000 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand".