13403431212021 has 16 divisors (see below), whose sum is σ = 19867686115200. Its totient is φ = 8930782864224.

The previous prime is 13403431212011. The next prime is 13403431212053. The reversal of 13403431212021 is 12021213430431.

13403431212021 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 3 + 431 + 21 + 202 + 1 = 666.

13403431212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13403431212021 - 2²⁵ = 13403397657589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13403431212011) 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, 134336536 + ... + 134436273.

It is an arithmetic number, because the mean of its divisors is an integer number (1241730382200).

Almost surely, 2^{13403431212021} is an apocalyptic number.

It is an amenable number.

13403431212021 is a deficient number, since it is larger than the sum of its proper divisors (6464254903179).

13403431212021 is a wasteful number, since it uses less digits than its factorization.

13403431212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268774665 (or 268774659 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 13403431212021 its reverse (12021213430431), we get a palindrome (25424644642452).

The spelling of 13403431212021 in words is "thirteen trillion, four hundred three billion, four hundred thirty-one million, two hundred twelve thousand, twenty-one".