1220132304521 has 8 divisors (see below), whose sum is σ = 1314120953544. Its totient is φ = 1126162558080.

The previous prime is 1220132304499. The next prime is 1220132304529. The reversal of 1220132304521 is 1254032310221.

It can be written as a sum of positive squares in 4 ways, for example, as 330666401296 + 889465903225 = 575036^2 + 943115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220132304521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220132304529) 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, 4591436 + ... + 4849901.

It is an arithmetic number, because the mean of its divisors is an integer number (164265119193).

Almost surely, 2^{1220132304521} is an apocalyptic number.

It is an amenable number.

1220132304521 is a deficient number, since it is larger than the sum of its proper divisors (93988649023).

1220132304521 is an equidigital number, since it uses as much as digits as its factorization.

1220132304521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9451291.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1220132304521 its reverse (1254032310221), we get a palindrome (2474164614742).

The spelling of 1220132304521 in words is "one trillion, two hundred twenty billion, one hundred thirty-two million, three hundred four thousand, five hundred twenty-one".