30111121 has 2 divisors, whose sum is σ = 30111122. Its totient is φ = 30111120.

The previous prime is 30111091. The next prime is 30111139. The reversal of 30111121 is 12111103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28206721 + 1904400 = 5311^2 + 1380^2 .

It is an emirp because it is prime and its reverse (12111103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30111121 - 2⁹ = 30110609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30111098 and 30111107.

It is not a weakly prime, because it can be changed into another prime (30111721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15055560 + 15055561.

It is an arithmetic number, because the mean of its divisors is an integer number (15055561).

Almost surely, 2^30111121 is an apocalyptic number.

It is an amenable number.

30111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30111121 is an equidigital number, since it uses as much as digits as its factorization.

30111121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 30111121 is about 5487.3601121122. The cubic root of 30111121 is about 311.1064209847.

Adding to 30111121 its reverse (12111103), we get a palindrome (42222224).

The spelling of 30111121 in words is "thirty million, one hundred eleven thousand, one hundred twenty-one".