1220551120 has 120 divisors (see below), whose sum is σ = 3001807872. Its totient is φ = 461472000.

The previous prime is 1220551103. The next prime is 1220551121. The reversal of 1220551120 is 211550221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220551121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6390225 + ... + 6390415.

Almost surely, 2^1220551120 is an apocalyptic number.

1220551120 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 1220551120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500903936).

1220551120 is an abundant number, since it is smaller than the sum of its proper divisors (1781256752).

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

1220551120 is a wasteful number, since it uses less digits than its factorization.

1220551120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1220551120 is about 34936.3867622283. The cubic root of 1220551120 is about 1068.6906043163.

The spelling of 1220551120 in words is "one billion, two hundred twenty million, five hundred fifty-one thousand, one hundred twenty".