221110121101 has 2 divisors, whose sum is σ = 221110121102. Its totient is φ = 221110121100.

The previous prime is 221110121093. The next prime is 221110121159. The reversal of 221110121101 is 101121011122.

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., 112060910025 + 109049211076 = 334755^2 + 330226^2 .

It is a cyclic number.

It is not a de Polignac number, because 221110121101 - 2³ = 221110121093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221110121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555060550 + 110555060551.

It is an arithmetic number, because the mean of its divisors is an integer number (110555060551).

Almost surely, 2^221110121101 is an apocalyptic number.

It is an amenable number.

221110121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221110121101 is an equidigital number, since it uses as much as digits as its factorization.

221110121101 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 221110121101 its reverse (101121011122), we get a palindrome (322231132223).

The spelling of 221110121101 in words is "two hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred one".