1220031443000 has 128 divisors (see below), whose sum is σ = 2968487308800. Its totient is φ = 468821376000.

The previous prime is 1220031442991. The next prime is 1220031443003. The reversal of 1220031443000 is 3441300221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220031443003) 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 31 ways as a sum of consecutive naturals, for example, 4103366 + ... + 4390634.

It is an arithmetic number, because the mean of its divisors is an integer number (23191307100).

Almost surely, 2^{1220031443000} is an apocalyptic number.

1220031443000 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 1220031443000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484243654400).

1220031443000 is an abundant number, since it is smaller than the sum of its proper divisors (1748455865800).

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

1220031443000 is a wasteful number, since it uses less digits than its factorization.

1220031443000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287458 (or 287444 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1220031443000 its reverse (3441300221), we get a palindrome (1223472743221).

The spelling of 1220031443000 in words is "one trillion, two hundred twenty billion, thirty-one million, four hundred forty-three thousand".