13140311421221 has 16 divisors (see below), whose sum is σ = 14096603885760. Its totient is φ = 12212030603520.

The previous prime is 13140311421109. The next prime is 13140311421227. The reversal of 13140311421221 is 12212411304131.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13140311421221 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 (13140311421227) 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, 21108806 + ... + 21722391.

It is an arithmetic number, because the mean of its divisors is an integer number (881037742860).

Almost surely, 2^{13140311421221} is an apocalyptic number.

It is an amenable number.

13140311421221 is a deficient number, since it is larger than the sum of its proper divisors (956292464539).

13140311421221 is a wasteful number, since it uses less digits than its factorization.

13140311421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42831524.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 13140311421221 its reverse (12212411304131), we get a palindrome (25352722725352).

The spelling of 13140311421221 in words is "thirteen trillion, one hundred forty billion, three hundred eleven million, four hundred twenty-one thousand, two hundred twenty-one".