10101001201221 has 64 divisors (see below), whose sum is σ = 16172187033600. Its totient is φ = 5486085835776.

The previous prime is 10101001201177. The next prime is 10101001201223. The reversal of 10101001201221 is 12210210010101.

10101001201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10101001201221 - 2¹⁰ = 10101001200197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10101001201197 and 10101001201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101001201223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15901906 + ... + 16524908.

It is an arithmetic number, because the mean of its divisors is an integer number (252690422400).

Almost surely, 2^{10101001201221} is an apocalyptic number.

It is an amenable number.

10101001201221 is a deficient number, since it is larger than the sum of its proper divisors (6071185832379).

10101001201221 is a wasteful number, since it uses less digits than its factorization.

10101001201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623458.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10101001201221 its reverse (12210210010101), we get a palindrome (22311211211322).

The spelling of 10101001201221 in words is "ten trillion, one hundred one billion, one million, two hundred one thousand, two hundred twenty-one".