1000020332221 has 4 divisors (see below), whose sum is σ = 1000973641500. Its totient is φ = 999067022944.

The previous prime is 1000020332167. The next prime is 1000020332231. The reversal of 1000020332221 is 1222330200001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 798769400121 + 201250932100 = 893739^2 + 448610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000020332221 - 2⁷ = 1000020332093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000020332195 and 1000020332204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020332231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476653066 + ... + 476655163.

It is an arithmetic number, because the mean of its divisors is an integer number (250243410375).

Almost surely, 2^{1000020332221} is an apocalyptic number.

It is an amenable number.

1000020332221 is a deficient number, since it is larger than the sum of its proper divisors (953309279).

1000020332221 is an equidigital number, since it uses as much as digits as its factorization.

1000020332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953309278.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 1000020332221 its reverse (1222330200001), we get a palindrome (2222350532222).

The spelling of 1000020332221 in words is "one trillion, twenty million, three hundred thirty-two thousand, two hundred twenty-one".