221200011101101 has 2 divisors, whose sum is σ = 221200011101102. Its totient is φ = 221200011101100.

The previous prime is 221200011101087. The next prime is 221200011101117. The reversal of 221200011101101 is 101101110002122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185389301619076 + 35810709482025 = 13615774^2 + 5984205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200011101101 is a prime.

It is a super-2 number, since 2×221200011101101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221200011101141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600005550550 + 110600005550551.

It is an arithmetic number, because the mean of its divisors is an integer number (110600005550551).

Almost surely, 2^{221200011101101} is an apocalyptic number.

It is an amenable number.

221200011101101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200011101101 is an equidigital number, since it uses as much as digits as its factorization.

221200011101101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221200011101101 its reverse (101101110002122), we get a palindrome (322301121103223).

The spelling of 221200011101101 in words is "two hundred twenty-one trillion, two hundred billion, eleven million, one hundred one thousand, one hundred one".