11013312231 has 32 divisors (see below), whose sum is σ = 16661990400. Its totient is φ = 7187564160.

The previous prime is 11013312227. The next prime is 11013312239. The reversal of 11013312231 is 13221331011.

11013312231 is a `hidden beast` number, since 1 + 101 + 331 + 2 + 231 = 666.

It is not a de Polignac number, because 11013312231 - 2² = 11013312227 is a prime.

It is a super-2 number, since 2×11013312231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11013312239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369570 + ... + 398256.

It is an arithmetic number, because the mean of its divisors is an integer number (520687200).

Almost surely, 2^11013312231 is an apocalyptic number.

11013312231 is a deficient number, since it is larger than the sum of its proper divisors (5648678169).

11013312231 is a wasteful number, since it uses less digits than its factorization.

11013312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28996 (or 28990 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11013312231 its reverse (13221331011), we get a palindrome (24234643242).

The spelling of 11013312231 in words is "eleven billion, thirteen million, three hundred twelve thousand, two hundred thirty-one".