10221221011 has 4 divisors (see below), whose sum is σ = 10235166112. Its totient is φ = 10207275912.

The previous prime is 10221220973. The next prime is 10221221027. The reversal of 10221221011 is 11012212201.

10221221011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10221221011 - 2¹³ = 10221212819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221220982 and 10221221000.

It is not an unprimeable number, because it can be changed into a prime (10221221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6971451 + ... + 6972916.

It is an arithmetic number, because the mean of its divisors is an integer number (2558791528).

Almost surely, 2^10221221011 is an apocalyptic number.

10221221011 is a deficient number, since it is larger than the sum of its proper divisors (13945101).

10221221011 is an equidigital number, since it uses as much as digits as its factorization.

10221221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13945100.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10221221011 its reverse (11012212201), we get a palindrome (21233433212).

The spelling of 10221221011 in words is "ten billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".