10221001111221 has 8 divisors (see below), whose sum is σ = 13628296651200. Its totient is φ = 6813853156032.

The previous prime is 10221001111207. The next prime is 10221001111253. The reversal of 10221001111221 is 12211110012201.

It is a happy number.

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

It is not a de Polignac number, because 10221001111221 - 2⁷ = 10221001111093 is a prime.

It is a super-2 number, since 2×10221001111221² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10221001111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221001111201) 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, 36734500 + ... + 37011693.

It is an arithmetic number, because the mean of its divisors is an integer number (1703537081400).

Almost surely, 2^{10221001111221} is an apocalyptic number.

It is an amenable number.

10221001111221 is a deficient number, since it is larger than the sum of its proper divisors (3407295539979).

10221001111221 is an equidigital number, since it uses as much as digits as its factorization.

10221001111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73792395.

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

Adding to 10221001111221 its reverse (12211110012201), we get a palindrome (22432111123422).

The spelling of 10221001111221 in words is "ten trillion, two hundred twenty-one billion, one million, one hundred eleven thousand, two hundred twenty-one".