1221424424423 has 8 divisors (see below), whose sum is σ = 1405158090240. Its totient is φ = 1040001874200.

The previous prime is 1221424424413. The next prime is 1221424424449. The reversal of 1221424424423 is 3244244241221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221424424423 - 2¹² = 1221424420327 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 (1221424424413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577777763 + ... + 577779876.

It is an arithmetic number, because the mean of its divisors is an integer number (175644761280).

Almost surely, 2^{1221424424423} is an apocalyptic number.

1221424424423 is a deficient number, since it is larger than the sum of its proper divisors (183733665817).

1221424424423 is a wasteful number, since it uses less digits than its factorization.

1221424424423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155557797.

The product of its digits is 98304, while the sum is 35.

Adding to 1221424424423 its reverse (3244244241221), we get a palindrome (4465668665644).

The spelling of 1221424424423 in words is "one trillion, two hundred twenty-one billion, four hundred twenty-four million, four hundred twenty-four thousand, four hundred twenty-three".