11020320231 has 16 divisors (see below), whose sum is σ = 15520496640. Its totient is φ = 6944535360.

The previous prime is 11020320217. The next prime is 11020320271. The reversal of 11020320231 is 13202302011.

It is not a de Polignac number, because 11020320231 - 2¹⁵ = 11020287463 is a prime.

It is a super-2 number, since 2×11020320231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11020320231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020320271) 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, 1373886 + ... + 1381883.

It is an arithmetic number, because the mean of its divisors is an integer number (970031040).

Almost surely, 2^11020320231 is an apocalyptic number.

11020320231 is a deficient number, since it is larger than the sum of its proper divisors (4500176409).

11020320231 is a wasteful number, since it uses less digits than its factorization.

11020320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755846.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 11020320231 its reverse (13202302011), we get a palindrome (24222622242).

The spelling of 11020320231 in words is "eleven billion, twenty million, three hundred twenty thousand, two hundred thirty-one".