1224422031421 has 4 divisors (see below), whose sum is σ = 1224453265344. Its totient is φ = 1224390797500.

The previous prime is 1224422031407. The next prime is 1224422031449. The reversal of 1224422031421 is 1241302244221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1224422031421 - 2⁵ = 1224422031389 is a prime.

It is a super-2 number, since 2×1224422031421² (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 1224422031421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224422031451) 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, 15558085 + ... + 15636586.

It is an arithmetic number, because the mean of its divisors is an integer number (306113316336).

Almost surely, 2^{1224422031421} is an apocalyptic number.

It is an amenable number.

1224422031421 is a deficient number, since it is larger than the sum of its proper divisors (31233923).

1224422031421 is an equidigital number, since it uses as much as digits as its factorization.

1224422031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31233922.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1224422031421 its reverse (1241302244221), we get a palindrome (2465724275642).

The spelling of 1224422031421 in words is "one trillion, two hundred twenty-four billion, four hundred twenty-two million, thirty-one thousand, four hundred twenty-one".