10121202221 has 8 divisors (see below), whose sum is σ = 10905734784. Its totient is φ = 9337523760.

The previous prime is 10121202209. The next prime is 10121202239. The reversal of 10121202221 is 12220212101.

10121202221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121202221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121202196 and 10121202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121202241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188801 + ... + 236406.

It is an arithmetic number, because the mean of its divisors is an integer number (1363216848).

Almost surely, 2^10121202221 is an apocalyptic number.

It is an amenable number.

10121202221 is a deficient number, since it is larger than the sum of its proper divisors (784532563).

10121202221 is a wasteful number, since it uses less digits than its factorization.

10121202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427051.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10121202221 its reverse (12220212101), we get a palindrome (22341414322).

The spelling of 10121202221 in words is "ten billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty-one".