1232120212321 has 4 divisors (see below), whose sum is σ = 1232179330500. Its totient is φ = 1232061094144.

The previous prime is 1232120212307. The next prime is 1232120212339.

1232120212321 is nontrivially palindromic in base 10.

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 741167749921 + 490952462400 = 860911^2 + 700680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232120212321 - 2⁹ = 1232120211809 is a prime.

It is a super-2 number, since 2×1232120212321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232120212292 and 1232120212301.

It is not an unprimeable number, because it can be changed into a prime (1232120215321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29527816 + ... + 29569513.

It is an arithmetic number, because the mean of its divisors is an integer number (308044832625).

Almost surely, 2^{1232120212321} is an apocalyptic number.

It is an amenable number.

1232120212321 is a deficient number, since it is larger than the sum of its proper divisors (59118179).

1232120212321 is an equidigital number, since it uses as much as digits as its factorization.

1232120212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59118178.

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 1232120 and 212321, that added together give a palindrome (1444441).

The spelling of 1232120212321 in words is "one trillion, two hundred thirty-two billion, one hundred twenty million, two hundred twelve thousand, three hundred twenty-one".