11234413321421 has 2 divisors, whose sum is σ = 11234413321422. Its totient is φ = 11234413321420.

The previous prime is 11234413321409. The next prime is 11234413321441. The reversal of 11234413321421 is 12412331443211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11092969633321 + 141443688100 = 3330611^2 + 376090^2 .

It is a cyclic number.

It is not a de Polignac number, because 11234413321421 - 2³⁰ = 11233339579597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11234413321441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5617206660710 + 5617206660711.

It is an arithmetic number, because the mean of its divisors is an integer number (5617206660711).

Almost surely, 2^{11234413321421} is an apocalyptic number.

It is an amenable number.

11234413321421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11234413321421 is an equidigital number, since it uses as much as digits as its factorization.

11234413321421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

Adding to 11234413321421 its reverse (12412331443211), we get a palindrome (23646744764632).

The spelling of 11234413321421 in words is "eleven trillion, two hundred thirty-four billion, four hundred thirteen million, three hundred twenty-one thousand, four hundred twenty-one".