10211222310221 has 4 divisors (see below), whose sum is σ = 10211229366492. Its totient is φ = 10211215253952.

The previous prime is 10211222310197. The next prime is 10211222310227. The reversal of 10211222310221 is 12201322211201.

10211222310221 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5503129515625 + 4708092794596 = 2345875^2 + 2169814^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211222310221 - 2⁴² = 5813175799117 is a prime.

It is a super-2 number, since 2×10211222310221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211222310193 and 10211222310202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211222310227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479180 + ... + 4544453.

It is an arithmetic number, because the mean of its divisors is an integer number (2552807341623).

Almost surely, 2^{10211222310221} is an apocalyptic number.

It is an amenable number.

10211222310221 is a deficient number, since it is larger than the sum of its proper divisors (7056271).

10211222310221 is an equidigital number, since it uses as much as digits as its factorization.

10211222310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7056270.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 10211222310221 its reverse (12201322211201), we get a palindrome (22412544521422).

The spelling of 10211222310221 in words is "ten trillion, two hundred eleven billion, two hundred twenty-two million, three hundred ten thousand, two hundred twenty-one".