1021200220321 has 8 divisors (see below), whose sum is σ = 1055781595904. Its totient is φ = 986721309360.

The previous prime is 1021200220307. The next prime is 1021200220357. The reversal of 1021200220321 is 1230220021201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1021200220321 - 2⁷ = 1021200220193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021200220295 and 1021200220304.

It is not an unprimeable number, because it can be changed into a prime (1021200223321) 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 7 ways as a sum of consecutive naturals, for example, 25595886 + ... + 25635751.

It is an arithmetic number, because the mean of its divisors is an integer number (131972699488).

Almost surely, 2^{1021200220321} is an apocalyptic number.

It is an amenable number.

1021200220321 is a deficient number, since it is larger than the sum of its proper divisors (34581375583).

1021200220321 is an equidigital number, since it uses as much as digits as its factorization.

1021200220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51232311.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1021200220321 its reverse (1230220021201), we get a palindrome (2251420241522).

The spelling of 1021200220321 in words is "one trillion, twenty-one billion, two hundred million, two hundred twenty thousand, three hundred twenty-one".