1220420424244 has 24 divisors (see below), whose sum is σ = 2455456671360. Its totient is φ = 519905362656.

The previous prime is 1220420424241. The next prime is 1220420424253. The reversal of 1220420424244 is 4424240240221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220420424241) 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 7 ways as a sum of consecutive naturals, for example, 130493659 + ... + 130503010.

It is an arithmetic number, because the mean of its divisors is an integer number (102310694640).

Almost surely, 2^{1220420424244} is an apocalyptic number.

1220420424244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220420424244 is an abundant number, since it is smaller than the sum of its proper divisors (1235036247116).

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

1220420424244 is a wasteful number, since it uses less digits than its factorization.

1220420424244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260996847 (or 260996845 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 1220420424244 its reverse (4424240240221), we get a palindrome (5644660664465).

The spelling of 1220420424244 in words is "one trillion, two hundred twenty billion, four hundred twenty million, four hundred twenty-four thousand, two hundred forty-four".