1220552432420 has 24 divisors (see below), whose sum is σ = 2565026997624. Its totient is φ = 487865374976.

The previous prime is 1220552432329. The next prime is 1220552432461. The reversal of 1220552432420 is 242342550221.

It can be written as a sum of positive squares in 4 ways, for example, as 303627448576 + 916924983844 = 551024^2 + 957562^2 .

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 7 ways as a sum of consecutive naturals, for example, 22196729 + ... + 22251648.

It is an arithmetic number, because the mean of its divisors is an integer number (106876124901).

Almost surely, 2^{1220552432420} is an apocalyptic number.

1220552432420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220552432420 is an abundant number, since it is smaller than the sum of its proper divisors (1344474565204).

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

1220552432420 is a wasteful number, since it uses less digits than its factorization.

1220552432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44449759 (or 44449757 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 1220552432420 its reverse (242342550221), we get a palindrome (1462894982641).

The spelling of 1220552432420 in words is "one trillion, two hundred twenty billion, five hundred fifty-two million, four hundred thirty-two thousand, four hundred twenty".