30511121 has 2 divisors, whose sum is σ = 30511122. Its totient is φ = 30511120.

The previous prime is 30511111. The next prime is 30511127. The reversal of 30511121 is 12111503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30250000 + 261121 = 5500^2 + 511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30511121 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30511096 and 30511105.

It is not a weakly prime, because it can be changed into another prime (30511127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15255560 + 15255561.

It is an arithmetic number, because the mean of its divisors is an integer number (15255561).

Almost surely, 2^30511121 is an apocalyptic number.

It is an amenable number.

30511121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30511121 is an equidigital number, since it uses as much as digits as its factorization.

30511121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 30511121 is about 5523.6872648621. The cubic root of 30511121 is about 312.4779581253.

Adding to 30511121 its reverse (12111503), we get a palindrome (42622624).

The spelling of 30511121 in words is "thirty million, five hundred eleven thousand, one hundred twenty-one".