14355512001221 has 16 divisors (see below), whose sum is σ = 14609905081200. Its totient is φ = 14103977832960.

The previous prime is 14355512001121. The next prime is 14355512001289. The reversal of 14355512001221 is 12210021555341.

It can be written as a sum of positive squares in 8 ways, for example, as 1500698500900 + 12854813500321 = 1225030^2 + 3585361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14355512001221 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 (14355512001121) 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, 4384991 + ... + 6923811.

It is an arithmetic number, because the mean of its divisors is an integer number (913119067575).

Almost surely, 2^{14355512001221} is an apocalyptic number.

It is an amenable number.

14355512001221 is a deficient number, since it is larger than the sum of its proper divisors (254393079979).

14355512001221 is a wasteful number, since it uses less digits than its factorization.

14355512001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539384.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 14355512001221 its reverse (12210021555341), we get a palindrome (26565533556562).

The spelling of 14355512001221 in words is "fourteen trillion, three hundred fifty-five billion, five hundred twelve million, one thousand, two hundred twenty-one".