13420142421 has 16 divisors (see below), whose sum is σ = 20529320064. Its totient is φ = 7638810624.

The previous prime is 13420142381. The next prime is 13420142443. The reversal of 13420142421 is 12424102431.

It is not a de Polignac number, because 13420142421 - 2⁷ = 13420142293 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13420142391 and 13420142400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420142621) 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, 1237900 + ... + 1248693.

It is an arithmetic number, because the mean of its divisors is an integer number (1283082504).

Almost surely, 2^13420142421 is an apocalyptic number.

It is an amenable number.

13420142421 is a deficient number, since it is larger than the sum of its proper divisors (7109177643).

13420142421 is a wasteful number, since it uses less digits than its factorization.

13420142421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486860.

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

Adding to 13420142421 its reverse (12424102431), we get a palindrome (25844244852).

The spelling of 13420142421 in words is "thirteen billion, four hundred twenty million, one hundred forty-two thousand, four hundred twenty-one".