10121021020321 has 4 divisors (see below), whose sum is σ = 10653706337200. Its totient is φ = 9588335703444.

The previous prime is 10121021020277. The next prime is 10121021020361. The reversal of 10121021020321 is 12302012012101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10121021020321 - 2⁷ = 10121021020193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121021020295 and 10121021020304.

It is not an unprimeable number, because it can be changed into a prime (10121021020361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266342658411 + ... + 266342658448.

It is an arithmetic number, because the mean of its divisors is an integer number (2663426584300).

Almost surely, 2^{10121021020321} is an apocalyptic number.

It is an amenable number.

10121021020321 is a deficient number, since it is larger than the sum of its proper divisors (532685316879).

10121021020321 is an equidigital number, since it uses as much as digits as its factorization.

10121021020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532685316878.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 10121021020321 its reverse (12302012012101), we get a palindrome (22423033032422).

The spelling of 10121021020321 in words is "ten trillion, one hundred twenty-one billion, twenty-one million, twenty thousand, three hundred twenty-one".