1232031440021 has 4 divisors (see below), whose sum is σ = 1234041279852. Its totient is φ = 1230021600192.

The previous prime is 1232031439993. The next prime is 1232031440039. The reversal of 1232031440021 is 1200441302321.

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 481477780996 + 750553659025 = 693886^2 + 866345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232031440021 - 2¹⁰ = 1232031438997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232031440071) 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, 1004918996 + ... + 1004920221.

It is an arithmetic number, because the mean of its divisors is an integer number (308510319963).

Almost surely, 2^{1232031440021} is an apocalyptic number.

It is an amenable number.

1232031440021 is a deficient number, since it is larger than the sum of its proper divisors (2009839831).

1232031440021 is an equidigital number, since it uses as much as digits as its factorization.

1232031440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009839830.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1232031440021 its reverse (1200441302321), we get a palindrome (2432472742342).

The spelling of 1232031440021 in words is "one trillion, two hundred thirty-two billion, thirty-one million, four hundred forty thousand, twenty-one".