11303231001221 has 16 divisors (see below), whose sum is σ = 11913919259760. Its totient is φ = 10707281195520.

The previous prime is 11303231001217. The next prime is 11303231001323. The reversal of 11303231001221 is 12210013230311.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 602546985121 + 10700684016100 = 776239^2 + 3271190^2 .

It is a cyclic number.

It is not a de Polignac number, because 11303231001221 - 2² = 11303231001217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11303231001193 and 11303231001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11303231001421) 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, 89317931 + ... + 89444391.

It is an arithmetic number, because the mean of its divisors is an integer number (744619953735).

Almost surely, 2^{11303231001221} is an apocalyptic number.

It is an amenable number.

11303231001221 is a deficient number, since it is larger than the sum of its proper divisors (610688258539).

11303231001221 is a wasteful number, since it uses less digits than its factorization.

11303231001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184696.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 11303231001221 its reverse (12210013230311), we get a palindrome (23513244231532).

The spelling of 11303231001221 in words is "eleven trillion, three hundred three billion, two hundred thirty-one million, one thousand, two hundred twenty-one".