1220221220120 has 192 divisors, whose sum is σ = 3363575608800. Its totient is φ = 396137226240.

The previous prime is 1220221220087. The next prime is 1220221220129. The reversal of 1220221220120 is 210221220221.

It is a happy number.

It is a super-2 number, since 2×1220221220120² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220221220129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82702664 + ... + 82717416.

Almost surely, 2^{1220221220120} is an apocalyptic number.

1220221220120 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 1220221220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681787804400).

1220221220120 is an abundant number, since it is smaller than the sum of its proper divisors (2143354388680).

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

1220221220120 is a wasteful number, since it uses less digits than its factorization.

1220221220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17018 (or 17007 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220221220120 its reverse (210221220221), we get a palindrome (1430442440341).

The spelling of 1220221220120 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty".