13123433103421 has 4 divisors (see below), whose sum is σ = 13178342865600. Its totient is φ = 13068523341244.

The previous prime is 13123433103343. The next prime is 13123433103427. The reversal of 13123433103421 is 12430133432131.

13123433103421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13123433103421 - 2⁷ = 13123433103293 is a prime.

It is a super-2 number, since 2×13123433103421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123433103427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27454880731 + ... + 27454881208.

It is an arithmetic number, because the mean of its divisors is an integer number (3294585716400).

Almost surely, 2^{13123433103421} is an apocalyptic number.

It is an amenable number.

13123433103421 is a deficient number, since it is larger than the sum of its proper divisors (54909762179).

13123433103421 is an equidigital number, since it uses as much as digits as its factorization.

13123433103421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54909762178.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 13123433103421 its reverse (12430133432131), we get a palindrome (25553566535552).

The spelling of 13123433103421 in words is "thirteen trillion, one hundred twenty-three billion, four hundred thirty-three million, one hundred three thousand, four hundred twenty-one".