10211101201221 has 16 divisors (see below), whose sum is σ = 13617627656640. Its totient is φ = 6805987960320.

The previous prime is 10211101201141. The next prime is 10211101201241. The reversal of 10211101201221 is 12210210111201.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-10211101201221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211101201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211101201241) 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, 538181691 + ... + 538200663.

It is an arithmetic number, because the mean of its divisors is an integer number (851101728540).

Almost surely, 2^{10211101201221} is an apocalyptic number.

It is an amenable number.

10211101201221 is a deficient number, since it is larger than the sum of its proper divisors (3406526455419).

10211101201221 is a wasteful number, since it uses less digits than its factorization.

10211101201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46756.

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

Adding to 10211101201221 its reverse (12210210111201), we get a palindrome (22421311312422).

The spelling of 10211101201221 in words is "ten trillion, two hundred eleven billion, one hundred one million, two hundred one thousand, two hundred twenty-one".