221202012212101 has 2 divisors, whose sum is σ = 221202012212102. Its totient is φ = 221202012212100.

The previous prime is 221202012212017. The next prime is 221202012212161. The reversal of 221202012212101 is 101212210202122.

221202012212101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121019228763876 + 100182783448225 = 11000874^2 + 10009135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221202012212101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221202012212161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110601006106050 + 110601006106051.

It is an arithmetic number, because the mean of its divisors is an integer number (110601006106051).

Almost surely, 2^{221202012212101} is an apocalyptic number.

It is an amenable number.

221202012212101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221202012212101 is an equidigital number, since it uses as much as digits as its factorization.

221202012212101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221202012212101 its reverse (101212210202122), we get a palindrome (322414222414223).

The spelling of 221202012212101 in words is "two hundred twenty-one trillion, two hundred two billion, twelve million, two hundred twelve thousand, one hundred one".