13124404221 has 16 divisors (see below), whose sum is σ = 18097766400. Its totient is φ = 8455035888.

The previous prime is 13124404099. The next prime is 13124404231. The reversal of 13124404221 is 12240442131.

It is not a de Polignac number, because 13124404221 - 2⁹ = 13124403709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13124404191 and 13124404200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13124404231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577981 + ... + 600258.

It is an arithmetic number, because the mean of its divisors is an integer number (1131110400).

Almost surely, 2^13124404221 is an apocalyptic number.

It is an amenable number.

13124404221 is a deficient number, since it is larger than the sum of its proper divisors (4973362179).

13124404221 is a wasteful number, since it uses less digits than its factorization.

13124404221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178368.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 13124404221 its reverse (12240442131), we get a palindrome (25364846352).

The spelling of 13124404221 in words is "thirteen billion, one hundred twenty-four million, four hundred four thousand, two hundred twenty-one".