1200122221320 has 640 divisors, whose sum is σ = 4479198134400. Its totient is φ = 285758668800.

The previous prime is 1200122221313. The next prime is 1200122221339. The reversal of 1200122221320 is 231222210021.

1200122221320 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 122 + 221 + 320 = 666.

It is a super-2 number, since 2×1200122221320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1200122221293 and 1200122221302.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1291842616 + ... + 1291843544.

It is an arithmetic number, because the mean of its divisors is an integer number (6998747085).

Almost surely, 2^{1200122221320} is an apocalyptic number.

1200122221320 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 1200122221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2239599067200).

1200122221320 is an abundant number, since it is smaller than the sum of its proper divisors (3279075913080).

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

1200122221320 is a wasteful number, since it uses less digits than its factorization.

1200122221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1558 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1200122221320 its reverse (231222210021), we get a palindrome (1431344431341).

The spelling of 1200122221320 in words is "one trillion, two hundred billion, one hundred twenty-two million, two hundred twenty-one thousand, three hundred twenty".