1220000204530 has 16 divisors (see below), whose sum is σ = 2271724519320. Its totient is φ = 471172492672.

The previous prime is 1220000204513. The next prime is 1220000204551. The reversal of 1220000204530 is 354020000221.

It can be written as a sum of positive squares in 4 ways, for example, as 1163487979801 + 56512224729 = 1078651^2 + 237723^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220000204498 and 1220000204507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2103448339 + ... + 2103448918.

Almost surely, 2^{1220000204530} is an apocalyptic number.

1220000204530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220000204530 is a deficient number, since it is larger than the sum of its proper divisors (1051724314790).

1220000204530 is a wasteful number, since it uses less digits than its factorization.

1220000204530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206897293.

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 1220000204530 its reverse (354020000221), we get a palindrome (1574020204751).

The spelling of 1220000204530 in words is "one trillion, two hundred twenty billion, two hundred four thousand, five hundred thirty".