121212201220000 has 120 divisors (see below), whose sum is σ = 325309306224672. Its totient is φ = 44077164000000.

The previous prime is 121212201219973. The next prime is 121212201220009. The reversal of 121212201220000 is 22102212121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (121212201220009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 275262276 + ... + 275702275.

Almost surely, 2^{121212201220000} is an apocalyptic number.

121212201220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212201220000 is an abundant number, since it is smaller than the sum of its proper divisors (204097105004672).

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

121212201220000 is an equidigital number, since it uses as much as digits as its factorization.

121212201220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550964592 (or 550964569 counting only the distinct ones).

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

Adding to 121212201220000 its reverse (22102212121), we get a palindrome (121234303432121).

The spelling of 121212201220000 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred one million, two hundred twenty thousand".