1232243340021 has 12 divisors (see below), whose sum is σ = 1845829530272. Its totient is φ = 821495559852.

The previous prime is 1232243339953. The next prime is 1232243340049. The reversal of 1232243340021 is 1200433422321.

1232243340021 is a `hidden beast` number, since 1 + 2 + 3 + 224 + 33 + 400 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1232243340021 is a prime.

It is a super-2 number, since 2×1232243340021² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232243340061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2535479881 + ... + 2535480366.

Almost surely, 2^{1232243340021} is an apocalyptic number.

It is an amenable number.

1232243340021 is a deficient number, since it is larger than the sum of its proper divisors (613586190251).

1232243340021 is an frugal number, since it uses more digits than its factorization.

1232243340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070960262 (or 5070960250 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 1232243340021 its reverse (1200433422321), we get a palindrome (2432676762342).

The spelling of 1232243340021 in words is "one trillion, two hundred thirty-two billion, two hundred forty-three million, three hundred forty thousand, twenty-one".