30110121221 has 2 divisors, whose sum is σ = 30110121222. Its totient is φ = 30110121220.

The previous prime is 30110121191. The next prime is 30110121277. The reversal of 30110121221 is 12212101103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30022492900 + 87628321 = 173270^2 + 9361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30110121221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30110121196 and 30110121205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30110121281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15055060610 + 15055060611.

It is an arithmetic number, because the mean of its divisors is an integer number (15055060611).

Almost surely, 2^30110121221 is an apocalyptic number.

It is an amenable number.

30110121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30110121221 is an equidigital number, since it uses as much as digits as its factorization.

30110121221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 30110121221 its reverse (12212101103), we get a palindrome (42322222324).

The spelling of 30110121221 in words is "thirty billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".