1220443412520 has 32 divisors (see below), whose sum is σ = 3661330237920. Its totient is φ = 325451576640.

The previous prime is 1220443412519. The next prime is 1220443412521. The reversal of 1220443412520 is 252143440221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220443412519) and next prime (1220443412521).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1220443412521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5085180766 + ... + 5085181005.

It is an arithmetic number, because the mean of its divisors is an integer number (114416569935).

Almost surely, 2^{1220443412520} is an apocalyptic number.

1220443412520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220443412520 is an abundant number, since it is smaller than the sum of its proper divisors (2440886825400).

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

1220443412520 is a wasteful number, since it uses less digits than its factorization.

1220443412520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170361785 (or 10170361781 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 1220443412520 its reverse (252143440221), we get a palindrome (1472586852741).

The spelling of 1220443412520 in words is "one trillion, two hundred twenty billion, four hundred forty-three million, four hundred twelve thousand, five hundred twenty".