22155122220 has 96 divisors (see below), whose sum is σ = 77341533696. Its totient is φ = 4603660800.

The previous prime is 22155122207. The next prime is 22155122221. The reversal of 22155122220 is 2222155122.

It is a super-3 number, since 3×22155122220³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22155122221) 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, 2393121 + ... + 2402360.

It is an arithmetic number, because the mean of its divisors is an integer number (805640976).

Almost surely, 2^22155122220 is an apocalyptic number.

22155122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22155122220 is an abundant number, since it is smaller than the sum of its proper divisors (55186411476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22155122220 is a wasteful number, since it uses less digits than its factorization.

22155122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795511 (or 4795509 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 22155122220 its reverse (2222155122), we get a palindrome (24377277342).

The spelling of 22155122220 in words is "twenty-two billion, one hundred fifty-five million, one hundred twenty-two thousand, two hundred twenty".