1220330402040 has 128 divisors (see below), whose sum is σ = 3781006848000. Its totient is φ = 314764047360.

The previous prime is 1220330402023. The next prime is 1220330402063. The reversal of 1220330402040 is 402040330221.

It is a junction number, because it is equal to n+sod(n) for n = 1220330401998 and 1220330402016.

It is a congruent number.

It is an unprimeable number.

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, 7331661 + ... + 7496259.

It is an arithmetic number, because the mean of its divisors is an integer number (29539116000).

Almost surely, 2^{1220330402040} is an apocalyptic number.

1220330402040 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 1220330402040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890503424000).

1220330402040 is an abundant number, since it is smaller than the sum of its proper divisors (2560676445960).

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

1220330402040 is a wasteful number, since it uses less digits than its factorization.

1220330402040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166637 (or 166633 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 1220330402040 its reverse (402040330221), we get a palindrome (1622370732261).

The spelling of 1220330402040 in words is "one trillion, two hundred twenty billion, three hundred thirty million, four hundred two thousand, forty".