1232120311 has 4 divisors (see below), whose sum is σ = 1244319624. Its totient is φ = 1219921000.

The previous prime is 1232120293. The next prime is 1232120333. The reversal of 1232120311 is 1130212321.

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 1232120311 - 2¹¹ = 1232118263 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 (1232120411) 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, 6099505 + ... + 6099706.

It is an arithmetic number, because the mean of its divisors is an integer number (311079906).

Almost surely, 2^1232120311 is an apocalyptic number.

1232120311 is a deficient number, since it is larger than the sum of its proper divisors (12199313).

1232120311 is a wasteful number, since it uses less digits than its factorization.

1232120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12199312.

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

The square root of 1232120311 is about 35101.5713465936. The cubic root of 1232120311 is about 1072.0565771613.

Adding to 1232120311 its reverse (1130212321), we get a palindrome (2362332632).

The spelling of 1232120311 in words is "one billion, two hundred thirty-two million, one hundred twenty thousand, three hundred eleven".