1232313121 has 4 divisors (see below), whose sum is σ = 1327106452. Its totient is φ = 1137519792.

The previous prime is 1232313101. The next prime is 1232313127. The reversal of 1232313121 is 1213132321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 808776721 + 423536400 = 28439^2 + 20580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232313121 - 2¹³ = 1232304929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232313127) 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, 47396646 + ... + 47396671.

It is an arithmetic number, because the mean of its divisors is an integer number (331776613).

Almost surely, 2^1232313121 is an apocalyptic number.

It is an amenable number.

1232313121 is a deficient number, since it is larger than the sum of its proper divisors (94793331).

1232313121 is an equidigital number, since it uses as much as digits as its factorization.

1232313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94793330.

The product of its digits is 216, while the sum is 19.

The square root of 1232313121 is about 35104.3176974001. The cubic root of 1232313121 is about 1072.1124949819.

Adding to 1232313121 its reverse (1213132321), we get a palindrome (2445445442).

The spelling of 1232313121 in words is "one billion, two hundred thirty-two million, three hundred thirteen thousand, one hundred twenty-one".