22155110043220 has 48 divisors (see below), whose sum is σ = 58006106299008. Its totient is φ = 6905488844160.

The previous prime is 22155110043211. The next prime is 22155110043229. The reversal of 22155110043220 is 2234001155122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22155110043211) and next prime (22155110043229).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155110043229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7193216007 + ... + 7193219086.

It is an arithmetic number, because the mean of its divisors is an integer number (1208460547896).

Almost surely, 2^{22155110043220} is an apocalyptic number.

22155110043220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22155110043220 is an abundant number, since it is smaller than the sum of its proper divisors (35850996255788).

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

22155110043220 is a wasteful number, since it uses less digits than its factorization.

22155110043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14386435120 (or 14386435118 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 22155110043220 its reverse (2234001155122), we get a palindrome (24389111198342).

The spelling of 22155110043220 in words is "twenty-two trillion, one hundred fifty-five billion, one hundred ten million, forty-three thousand, two hundred twenty".