1220440404120 has 128 divisors (see below), whose sum is σ = 4404597004800. Its totient is φ = 264275813376.

The previous prime is 1220440404103. The next prime is 1220440404121. The reversal of 1220440404120 is 214040440221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220440404121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38218389 + ... + 38250308.

It is an arithmetic number, because the mean of its divisors is an integer number (34410914100).

Almost surely, 2^{1220440404120} is an apocalyptic number.

1220440404120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220440404120 is an abundant number, since it is smaller than the sum of its proper divisors (3184156600680).

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

1220440404120 is a wasteful number, since it uses less digits than its factorization.

1220440404120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76468737 (or 76468733 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 1220440404120 its reverse (214040440221), we get a palindrome (1434480844341).

The spelling of 1220440404120 in words is "one trillion, two hundred twenty billion, four hundred forty million, four hundred four thousand, one hundred twenty".