9920201121 has 12 divisors (see below), whose sum is σ = 14408348500. Its totient is φ = 6576927840.

The previous prime is 9920201117. The next prime is 9920201219. The reversal of 9920201121 is 1211020299.

It can be written as a sum of positive squares in 2 ways, for example, as 4556250000 + 5363951121 = 67500^2 + 73239^2 .

It is not a de Polignac number, because 9920201121 - 2² = 9920201117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9920201021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3043246 + ... + 3046503.

Almost surely, 2^9920201121 is an apocalyptic number.

It is an amenable number.

9920201121 is a deficient number, since it is larger than the sum of its proper divisors (4488147379).

9920201121 is a wasteful number, since it uses less digits than its factorization.

9920201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089936 (or 6089933 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 9920201121 is about 99600.2064305090. The cubic root of 9920201121 is about 2148.6886628305.

The spelling of 9920201121 in words is "nine billion, nine hundred twenty million, two hundred one thousand, one hundred twenty-one".