11561312222 has 16 divisors (see below), whose sum is σ = 17394082992. Its totient is φ = 5763311040.

The previous prime is 11561312221. The next prime is 11561312297. The reversal of 11561312222 is 22221316511.

It is a junction number, because it is equal to n+sod(n) for n = 11561312191 and 11561312200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561312221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972788 + ... + 984600.

It is an arithmetic number, because the mean of its divisors is an integer number (1087130187).

Almost surely, 2^11561312222 is an apocalyptic number.

11561312222 is a deficient number, since it is larger than the sum of its proper divisors (5832770770).

11561312222 is a wasteful number, since it uses less digits than its factorization.

11561312222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13243.

The product of its digits is 1440, while the sum is 26.

Adding to 11561312222 its reverse (22221316511), we get a palindrome (33782628733).

The spelling of 11561312222 in words is "eleven billion, five hundred sixty-one million, three hundred twelve thousand, two hundred twenty-two".