13342505021 has 4 divisors (see below), whose sum is σ = 13357548192. Its totient is φ = 13327461852.

The previous prime is 13342505009. The next prime is 13342505023. The reversal of 13342505021 is 12050524331.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12050524331 = 101293 ⋅118967.

It is a cyclic number.

It is not a de Polignac number, because 13342505021 - 2¹⁰ = 13342503997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13342505023) 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, 7520255 + ... + 7522028.

It is an arithmetic number, because the mean of its divisors is an integer number (3339387048).

Almost surely, 2^13342505021 is an apocalyptic number.

It is an amenable number.

13342505021 is a deficient number, since it is larger than the sum of its proper divisors (15043171).

13342505021 is an equidigital number, since it uses as much as digits as its factorization.

13342505021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15043170.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 13342505021 in words is "thirteen billion, three hundred forty-two million, five hundred five thousand, twenty-one".