1230011311 has 4 divisors (see below), whose sum is σ = 1230295824. Its totient is φ = 1229726800.

The previous prime is 1230011309. The next prime is 1230011323. The reversal of 1230011311 is 1131100321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1230011311 - 2¹ = 1230011309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230011291 and 1230011300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230011371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135670 + ... + 144451.

It is an arithmetic number, because the mean of its divisors is an integer number (307573956).

Almost surely, 2^1230011311 is an apocalyptic number.

1230011311 is a deficient number, since it is larger than the sum of its proper divisors (284513).

1230011311 is an equidigital number, since it uses as much as digits as its factorization.

1230011311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284512.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1230011311 is about 35071.5170900832. The cubic root of 1230011311 is about 1071.4445539821. Note that the first 3 decimals are identical.

Adding to 1230011311 its reverse (1131100321), we get a palindrome (2361111632).

The spelling of 1230011311 in words is "one billion, two hundred thirty million, eleven thousand, three hundred eleven".