10011121210221 has 4 divisors (see below), whose sum is σ = 13348161613632. Its totient is φ = 6674080806812.

The previous prime is 10011121210199. The next prime is 10011121210231. The reversal of 10011121210221 is 12201212111001.

It is a happy number.

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 10011121210221 - 2¹⁰ = 10011121209197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10011121210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011121210231) 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, 1668520201701 + ... + 1668520201706.

It is an arithmetic number, because the mean of its divisors is an integer number (3337040403408).

Almost surely, 2^{10011121210221} is an apocalyptic number.

It is an amenable number.

10011121210221 is a deficient number, since it is larger than the sum of its proper divisors (3337040403411).

10011121210221 is an equidigital number, since it uses as much as digits as its factorization.

10011121210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337040403410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10011121210221 its reverse (12201212111001), we get a palindrome (22212333321222).

The spelling of 10011121210221 in words is "ten trillion, eleven billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".