1232012311 has 4 divisors (see below), whose sum is σ = 1240281000. Its totient is φ = 1223743624.

The previous prime is 1232012291. The next prime is 1232012333. The reversal of 1232012311 is 1132102321.

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 1232012311 - 2¹³ = 1232004119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232012381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4134121 + ... + 4134418.

It is an arithmetic number, because the mean of its divisors is an integer number (310070250).

Almost surely, 2^1232012311 is an apocalyptic number.

1232012311 is a deficient number, since it is larger than the sum of its proper divisors (8268689).

1232012311 is an equidigital number, since it uses as much as digits as its factorization.

1232012311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8268688.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1232012311 is about 35100.0329202125. The cubic root of 1232012311 is about 1072.0252529763.

Adding to 1232012311 its reverse (1132102321), we get a palindrome (2364114632).

The spelling of 1232012311 in words is "one billion, two hundred thirty-two million, twelve thousand, three hundred eleven".