13124441400421 has 8 divisors (see below), whose sum is σ = 14134225555800. Its totient is φ = 12114687493632.

The previous prime is 13124441400341. The next prime is 13124441400431. The reversal of 13124441400421 is 12400414442131.

It can be written as a sum of positive squares in 4 ways, for example, as 691666672225 + 12432774728196 = 831665^2 + 3526014^2 .

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 13124441400421 - 2¹¹ = 13124441398373 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 (13124441400431) 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, 6656980 + ... + 8400253.

It is an arithmetic number, because the mean of its divisors is an integer number (1766778194475).

Almost surely, 2^{13124441400421} is an apocalyptic number.

It is an amenable number.

13124441400421 is a deficient number, since it is larger than the sum of its proper divisors (1009784155379).

13124441400421 is a wasteful number, since it uses less digits than its factorization.

13124441400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15124295.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 13124441400421 its reverse (12400414442131), we get a palindrome (25524855842552).

The spelling of 13124441400421 in words is "thirteen trillion, one hundred twenty-four billion, four hundred forty-one million, four hundred thousand, four hundred twenty-one".