11312122231 has 4 divisors (see below), whose sum is σ = 11354175000. Its totient is φ = 11270069464.

The previous prime is 11312122193. The next prime is 11312122271. The reversal of 11312122231 is 13222121311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11312122231 - 2¹⁹ = 11311597943 is a prime.

It is a super-2 number, since 2×11312122231² (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 = 11312122199 and 11312122208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312122271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21025981 + ... + 21026518.

It is an arithmetic number, because the mean of its divisors is an integer number (2838543750).

Almost surely, 2^11312122231 is an apocalyptic number.

11312122231 is a deficient number, since it is larger than the sum of its proper divisors (42052769).

11312122231 is an equidigital number, since it uses as much as digits as its factorization.

11312122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42052768.

The product of its digits is 144, while the sum is 19.

Adding to 11312122231 its reverse (13222121311), we get a palindrome (24534243542).

The spelling of 11312122231 in words is "eleven billion, three hundred twelve million, one hundred twenty-two thousand, two hundred thirty-one".