22120010555 has 4 divisors (see below), whose sum is σ = 26544012672. Its totient is φ = 17696008440.

The previous prime is 22120010519. The next prime is 22120010557. The reversal of 22120010555 is 55501002122.

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

It is a de Polignac number, because none of the positive numbers 2^k-22120010555 is a prime.

It is a super-2 number, since 2×22120010555² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22120010555.

It is not an unprimeable number, because it can be changed into a prime (22120010557) 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, 2212001051 + ... + 2212001060.

It is an arithmetic number, because the mean of its divisors is an integer number (6636003168).

Almost surely, 2^22120010555 is an apocalyptic number.

22120010555 is a deficient number, since it is larger than the sum of its proper divisors (4424002117).

22120010555 is an equidigital number, since it uses as much as digits as its factorization.

22120010555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424002116.

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 22120010555 its reverse (55501002122), we get a palindrome (77621012677).

The spelling of 22120010555 in words is "twenty-two billion, one hundred twenty million, ten thousand, five hundred fifty-five".