22120312505 has 16 divisors (see below), whose sum is σ = 26664584400. Its totient is φ = 17616218880.

The previous prime is 22120312499. The next prime is 22120312507. The reversal of 22120312505 is 50521302122.

It can be written as a sum of positive squares in 8 ways, for example, as 4012842409 + 18107470096 = 63347^2 + 134564^2 .

It is not a de Polignac number, because 22120312505 - 2⁶ = 22120312441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22120312507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851491 + ... + 1863399.

It is an arithmetic number, because the mean of its divisors is an integer number (1666536525).

Almost surely, 2^22120312505 is an apocalyptic number.

It is an amenable number.

22120312505 is a deficient number, since it is larger than the sum of its proper divisors (4544271895).

22120312505 is a wasteful number, since it uses less digits than its factorization.

22120312505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13564.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 22120312505 its reverse (50521302122), we get a palindrome (72641614627).

The spelling of 22120312505 in words is "twenty-two billion, one hundred twenty million, three hundred twelve thousand, five hundred five".