110000121221 has 2 divisors, whose sum is σ = 110000121222. Its totient is φ = 110000121220.

The previous prime is 110000121191. The next prime is 110000121277. The reversal of 110000121221 is 122121000011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104966928196 + 5033193025 = 323986^2 + 70945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110000121221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110000121521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000060610 + 55000060611.

It is an arithmetic number, because the mean of its divisors is an integer number (55000060611).

Almost surely, 2^110000121221 is an apocalyptic number.

It is an amenable number.

110000121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110000121221 is an equidigital number, since it uses as much as digits as its factorization.

110000121221 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 11.

Adding to 110000121221 its reverse (122121000011), we get a palindrome (232121121232).

The spelling of 110000121221 in words is "one hundred ten billion, one hundred twenty-one thousand, two hundred twenty-one".