9920301421801 has 9 divisors (see below), whose sum is σ = 10047716412951. Its totient is φ = 9794482313304.

The previous prime is 9920301421781. The next prime is 9920301421879. The reversal of 9920301421801 is 1081241030299.

It is a happy number.

The square root of 9920301421801 is 3149651.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5642767453401 + 4277533968400 = 2375451^2 + 2068220^2 .

It is not a de Polignac number, because 9920301421801 - 2⁷ = 9920301421673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9920301431801) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 248802495 + ... + 248842363.

Almost surely, 2^{9920301421801} is an apocalyptic number.

9920301421801 is the 3149651-st square number.

9920301421801 is the 1574826-th centered octagonal number.

It is an amenable number.

9920301421801 is a deficient number, since it is larger than the sum of its proper divisors (127414991150).

9920301421801 is an frugal number, since it uses more digits than its factorization.

9920301421801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79896 (or 39948 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 9920301421801 in words is "nine trillion, nine hundred twenty billion, three hundred one million, four hundred twenty-one thousand, eight hundred one".