221011322101 has 2 divisors, whose sum is σ = 221011322102. Its totient is φ = 221011322100.

The previous prime is 221011322071. The next prime is 221011322107. The reversal of 221011322101 is 101223110122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162226895076 + 58784427025 = 402774^2 + 242455^2 .

It is a cyclic number.

It is not a de Polignac number, because 221011322101 - 2⁵ = 221011322069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221011322107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505661050 + 110505661051.

It is an arithmetic number, because the mean of its divisors is an integer number (110505661051).

Almost surely, 2^221011322101 is an apocalyptic number.

It is an amenable number.

221011322101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011322101 is an equidigital number, since it uses as much as digits as its factorization.

221011322101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221011322101 its reverse (101223110122), we get a palindrome (322234432223).

The spelling of 221011322101 in words is "two hundred twenty-one billion, eleven million, three hundred twenty-two thousand, one hundred one".