1200112221220 has 288 divisors, whose sum is σ = 2897085502080. Its totient is φ = 416967936000.

The previous prime is 1200112221149. The next prime is 1200112221257. The reversal of 1200112221220 is 221222110021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1200112221194 and 1200112221203.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 935394699 + ... + 935395981.

It is an arithmetic number, because the mean of its divisors is an integer number (10059324660).

Almost surely, 2^{1200112221220} is an apocalyptic number.

1200112221220 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 1200112221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448542751040).

1200112221220 is an abundant number, since it is smaller than the sum of its proper divisors (1696973280860).

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

1200112221220 is a wasteful number, since it uses less digits than its factorization.

1200112221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1200112221220 its reverse (221222110021), we get a palindrome (1421334331241).

It can be divided in two parts, 12001 and 12221220, that added together give a palindrome (12233221).

The spelling of 1200112221220 in words is "one trillion, two hundred billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty".