11220313231 has 16 divisors (see below), whose sum is σ = 11546726400. Its totient is φ = 10897084800.

The previous prime is 11220313213. The next prime is 11220313241. The reversal of 11220313231 is 13231302211.

It is a cyclic number.

It is not a de Polignac number, because 11220313231 - 2¹¹ = 11220311183 is a prime.

It is a super-2 number, since 2×11220313231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220313199 and 11220313208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220313201) 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, 6603220 + ... + 6604918.

It is an arithmetic number, because the mean of its divisors is an integer number (721670400).

Almost surely, 2^11220313231 is an apocalyptic number.

11220313231 is a deficient number, since it is larger than the sum of its proper divisors (326413169).

11220313231 is a wasteful number, since it uses less digits than its factorization.

11220313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11220313231 its reverse (13231302211), we get a palindrome (24451615442).

The spelling of 11220313231 in words is "eleven billion, two hundred twenty million, three hundred thirteen thousand, two hundred thirty-one".