1224424442021 has 16 divisors (see below), whose sum is σ = 1369715695488. Its totient is φ = 1084852108800.

The previous prime is 1224424441993. The next prime is 1224424442047. The reversal of 1224424442021 is 1202444244221.

It is a cyclic number.

It is not a de Polignac number, because 1224424442021 - 2³⁰ = 1223350700197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224424442071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948785 + ... + 1830038.

It is an arithmetic number, because the mean of its divisors is an integer number (85607230968).

Almost surely, 2^{1224424442021} is an apocalyptic number.

1224424442021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1224424442021 is a deficient number, since it is larger than the sum of its proper divisors (145291253467).

1224424442021 is a wasteful number, since it uses less digits than its factorization.

1224424442021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779852.

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 1224424442021 its reverse (1202444244221), we get a palindrome (2426868686242).

The spelling of 1224424442021 in words is "one trillion, two hundred twenty-four billion, four hundred twenty-four million, four hundred forty-two thousand, twenty-one".