13421445121 has 4 divisors (see below), whose sum is σ = 15338794432. Its totient is φ = 11504095812.

The previous prime is 13421445109. The next prime is 13421445127. The reversal of 13421445121 is 12154412431.

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: 12154412431 = 7 ⋅1736344633.

It is a cyclic number.

It is not a de Polignac number, because 13421445121 - 2⁹ = 13421444609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13421445121.

It is not an unprimeable number, because it can be changed into a prime (13421445127) 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, 958674645 + ... + 958674658.

It is an arithmetic number, because the mean of its divisors is an integer number (3834698608).

Almost surely, 2^13421445121 is an apocalyptic number.

It is an amenable number.

13421445121 is a deficient number, since it is larger than the sum of its proper divisors (1917349311).

13421445121 is an equidigital number, since it uses as much as digits as its factorization.

13421445121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917349310.

The product of its digits is 3840, while the sum is 28.

Adding to 13421445121 its reverse (12154412431), we get a palindrome (25575857552).

The spelling of 13421445121 in words is "thirteen billion, four hundred twenty-one million, four hundred forty-five thousand, one hundred twenty-one".