1222121020000 has 240 divisors, whose sum is σ = 3034576524672. Its totient is φ = 484323840000.

The previous prime is 1222121019989. The next prime is 1222121020007. The reversal of 1222121020000 is 201212221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222121020007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1233219505 + ... + 1233220495.

Almost surely, 2^{1222121020000} is an apocalyptic number.

1222121020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222121020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517288262336).

1222121020000 is an abundant number, since it is smaller than the sum of its proper divisors (1812455504672).

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

1222121020000 is an equidigital number, since it uses as much as digits as its factorization.

1222121020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1222121020000 its reverse (201212221), we get a palindrome (1222322232221).

The spelling of 1222121020000 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty thousand".