1221544224423 has 48 divisors (see below), whose sum is σ = 1812886732800. Its totient is φ = 792310559040.

The previous prime is 1221544224403. The next prime is 1221544224449. The reversal of 1221544224423 is 3244224451221.

1221544224423 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 5 + 4 + 4 + 224 + 423 = 666.

It is not a de Polignac number, because 1221544224423 - 2⁸ = 1221544224167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221544224403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52716186 + ... + 52739352.

It is an arithmetic number, because the mean of its divisors is an integer number (37768473600).

Almost surely, 2^{1221544224423} is an apocalyptic number.

1221544224423 is a deficient number, since it is larger than the sum of its proper divisors (591342508377).

1221544224423 is a wasteful number, since it uses less digits than its factorization.

1221544224423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24252 (or 24249 counting only the distinct ones).

The product of its digits is 122880, while the sum is 36.

Adding to 1221544224423 its reverse (3244224451221), we get a palindrome (4465768675644).

The spelling of 1221544224423 in words is "one trillion, two hundred twenty-one billion, five hundred forty-four million, two hundred twenty-four thousand, four hundred twenty-three".