1224020415243 has 4 divisors (see below), whose sum is σ = 1632027220328. Its totient is φ = 816013610160.

The previous prime is 1224020415239. The next prime is 1224020415257. The reversal of 1224020415243 is 3425140204221.

It is a happy number.

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

It is not a de Polignac number, because 1224020415243 - 2² = 1224020415239 is a prime.

It is a super-2 number, since 2×1224020415243² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1224020415243.

It is not an unprimeable number, because it can be changed into a prime (1224020415203) 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, 204003402538 + ... + 204003402543.

It is an arithmetic number, because the mean of its divisors is an integer number (408006805082).

Almost surely, 2^{1224020415243} is an apocalyptic number.

1224020415243 is a deficient number, since it is larger than the sum of its proper divisors (408006805085).

1224020415243 is an equidigital number, since it uses as much as digits as its factorization.

1224020415243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408006805084.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 1224020415243 its reverse (3425140204221), we get a palindrome (4649160619464).

The spelling of 1224020415243 in words is "one trillion, two hundred twenty-four billion, twenty million, four hundred fifteen thousand, two hundred forty-three".