13522004121 has 4 divisors (see below), whose sum is σ = 18029338832. Its totient is φ = 9014669412.

The previous prime is 13522004117. The next prime is 13522004123. The reversal of 13522004121 is 12140022531.

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 not a de Polignac number, because 13522004121 - 2² = 13522004117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13522004123) 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, 2253667351 + ... + 2253667356.

It is an arithmetic number, because the mean of its divisors is an integer number (4507334708).

Almost surely, 2^13522004121 is an apocalyptic number.

It is an amenable number.

13522004121 is a deficient number, since it is larger than the sum of its proper divisors (4507334711).

13522004121 is an equidigital number, since it uses as much as digits as its factorization.

13522004121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507334710.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 13522004121 its reverse (12140022531), we get a palindrome (25662026652).

The spelling of 13522004121 in words is "thirteen billion, five hundred twenty-two million, four thousand, one hundred twenty-one".