11202031321 has 6 divisors (see below), whose sum is σ = 12130010430. Its totient is φ = 10340336448.

The previous prime is 11202031307. The next prime is 11202031327. The reversal of 11202031321 is 12313020211.

It can be written as a sum of positive squares in 3 ways, for example, as 84437721 + 11117593600 = 9189^2 + 105440^2 .

It is not a de Polignac number, because 11202031321 - 2¹⁵ = 11201998553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11202031295 and 11202031304.

It is not an unprimeable number, because it can be changed into a prime (11202031327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33141936 + ... + 33142273.

It is an arithmetic number, because the mean of its divisors is an integer number (2021668405).

Almost surely, 2^11202031321 is an apocalyptic number.

It is an amenable number.

11202031321 is a deficient number, since it is larger than the sum of its proper divisors (927979109).

11202031321 is an equidigital number, since it uses as much as digits as its factorization.

11202031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66284235 (or 66284222 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11202031321 its reverse (12313020211), we get a palindrome (23515051532).

It can be divided in two parts, 112020 and 31321, that added together give a palindrome (143341).

The spelling of 11202031321 in words is "eleven billion, two hundred two million, thirty-one thousand, three hundred twenty-one".