121221012220000 has 240 divisors, whose sum is σ = 371809093404672. Its totient is φ = 37783172160000.

The previous prime is 121221012219977. The next prime is 121221012220013. The reversal of 121221012220000 is 22210122121.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37817472 + ... + 40897471.

Almost surely, 2^{121221012220000} is an apocalyptic number.

121221012220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221012220000 is an abundant number, since it is smaller than the sum of its proper divisors (250588081184672).

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

121221012220000 is an equidigital number, since it uses as much as digits as its factorization.

121221012220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78714991 (or 78714968 counting only the distinct ones).

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

Adding to 121221012220000 its reverse (22210122121), we get a palindrome (121243222342121).

The spelling of 121221012220000 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twelve million, two hundred twenty thousand".