1200010021120 has 144 divisors (see below), whose sum is σ = 2917437828480. Its totient is φ = 472833441792.

The previous prime is 1200010021081. The next prime is 1200010021127. The reversal of 1200010021120 is 211200100021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1200010021097 and 1200010021106.

It is not an unprimeable number, because it can be changed into a prime (1200010021127) 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 15 ways as a sum of consecutive naturals, for example, 78388507 + ... + 78403813.

It is an arithmetic number, because the mean of its divisors is an integer number (20259984920).

Almost surely, 2^{1200010021120} is an apocalyptic number.

1200010021120 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 1200010021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458718914240).

1200010021120 is an abundant number, since it is smaller than the sum of its proper divisors (1717427807360).

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

1200010021120 is an equidigital number, since it uses as much as digits as its factorization.

1200010021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16240 (or 16226 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200010021120 its reverse (211200100021), we get a palindrome (1411210121141).

The spelling of 1200010021120 in words is "one trillion, two hundred billion, ten million, twenty-one thousand, one hundred twenty".