10212222201221 has 4 divisors (see below), whose sum is σ = 10812941154252. Its totient is φ = 9611503248192.

The previous prime is 10212222201217. The next prime is 10212222201271. The reversal of 10212222201221 is 12210222221201.

10212222201221 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 can be written as a sum of positive squares in 2 ways, for example, as 8592584178721 + 1619638022500 = 2931311^2 + 1272650^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212222201221 - 2² = 10212222201217 is a prime.

It is a super-2 number, since 2×10212222201221² (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 = 10212222201193 and 10212222201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212222201271) 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, 300359476490 + ... + 300359476523.

It is an arithmetic number, because the mean of its divisors is an integer number (2703235288563).

Almost surely, 2^{10212222201221} is an apocalyptic number.

It is an amenable number.

10212222201221 is a deficient number, since it is larger than the sum of its proper divisors (600718953031).

10212222201221 is an equidigital number, since it uses as much as digits as its factorization.

10212222201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600718953030.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 10212222201221 its reverse (12210222221201), we get a palindrome (22422444422422).

The spelling of 10212222201221 in words is "ten trillion, two hundred twelve billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".