1199220120 has 768 divisors, whose sum is σ = 5200588800. Its totient is φ = 243855360.

The previous prime is 1199220119. The next prime is 1199220149. The reversal of 1199220120 is 210229911.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 27888819 + ... + 27888861.

It is an arithmetic number, because the mean of its divisors is an integer number (6771600).

Almost surely, 2^1199220120 is an apocalyptic number.

1199220120 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 1199220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2600294400).

1199220120 is an abundant number, since it is smaller than the sum of its proper divisors (4001368680).

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

1199220120 is a wasteful number, since it uses less digits than its factorization.

1199220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1199220120 is about 34629.7577236688. The cubic root of 1199220120 is about 1062.4283120260.

The spelling of 1199220120 in words is "one billion, one hundred ninety-nine million, two hundred twenty thousand, one hundred twenty".