10122212100221 has 4 divisors (see below), whose sum is σ = 10900843800252. Its totient is φ = 9343580400192.

The previous prime is 10122212100193. The next prime is 10122212100241. The reversal of 10122212100221 is 12200121222101.

10122212100221 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 1527869044900 + 8594343055321 = 1236070^2 + 2931611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10122212100221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10122212100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122212100241) 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, 389315849996 + ... + 389315850021.

It is an arithmetic number, because the mean of its divisors is an integer number (2725210950063).

Almost surely, 2^{10122212100221} is an apocalyptic number.

It is an amenable number.

10122212100221 is a deficient number, since it is larger than the sum of its proper divisors (778631700031).

10122212100221 is an equidigital number, since it uses as much as digits as its factorization.

10122212100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778631700030.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10122212100221 its reverse (12200121222101), we get a palindrome (22322333322322).

The spelling of 10122212100221 in words is "ten trillion, one hundred twenty-two billion, two hundred twelve million, one hundred thousand, two hundred twenty-one".