10121020221 has 16 divisors (see below), whose sum is σ = 14676641280. Its totient is φ = 6166651200.

The previous prime is 10121020207. The next prime is 10121020241. The reversal of 10121020221 is 12202012101.

10121020221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10121020221 - 2⁹ = 10121019709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10121020197 and 10121020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121020241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280781 + ... + 1288658.

It is an arithmetic number, because the mean of its divisors is an integer number (917290080).

Almost surely, 2^10121020221 is an apocalyptic number.

It is an amenable number.

10121020221 is a deficient number, since it is larger than the sum of its proper divisors (4555621059).

10121020221 is a wasteful number, since it uses less digits than its factorization.

10121020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569556.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10121020221 its reverse (12202012101), we get a palindrome (22323032322).

The spelling of 10121020221 in words is "ten billion, one hundred twenty-one million, twenty thousand, two hundred twenty-one".