1230305111 has 16 divisors (see below), whose sum is σ = 1450068480. Its totient is φ = 1022048160.

The previous prime is 1230305101. The next prime is 1230305143. The reversal of 1230305111 is 1115030321.

It is a de Polignac number, because none of the positive numbers 2^k-1230305111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1230305111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230305101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8345 + ... + 50301.

It is an arithmetic number, because the mean of its divisors is an integer number (90629280).

Almost surely, 2^1230305111 is an apocalyptic number.

1230305111 is a deficient number, since it is larger than the sum of its proper divisors (219763369).

1230305111 is an equidigital number, since it uses as much as digits as its factorization.

1230305111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42094.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1230305111 is about 35075.7054241251. The cubic root of 1230305111 is about 1071.5298554605.

Adding to 1230305111 its reverse (1115030321), we get a palindrome (2345335432).

The spelling of 1230305111 in words is "one billion, two hundred thirty million, three hundred five thousand, one hundred eleven".