13142232421 has 4 divisors (see below), whose sum is σ = 13146354144. Its totient is φ = 13138110700.

The previous prime is 13142232403. The next prime is 13142232463. The reversal of 13142232421 is 12423224131.

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 13142232421 - 2¹¹ = 13142230373 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 (13142232401) 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, 2056075 + ... + 2062456.

It is an arithmetic number, because the mean of its divisors is an integer number (3286588536).

Almost surely, 2^13142232421 is an apocalyptic number.

It is an amenable number.

13142232421 is a deficient number, since it is larger than the sum of its proper divisors (4121723).

13142232421 is an equidigital number, since it uses as much as digits as its factorization.

13142232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121722.

The product of its digits is 2304, while the sum is 25.

Adding to 13142232421 its reverse (12423224131), we get a palindrome (25565456552).

The spelling of 13142232421 in words is "thirteen billion, one hundred forty-two million, two hundred thirty-two thousand, four hundred twenty-one".