55122221130 has 64 divisors (see below), whose sum is σ = 138555076608. Its totient is φ = 14008230720.

The previous prime is 55122221041. The next prime is 55122221191. The reversal of 55122221130 is 3112222155.

It is a self number, because there is not a number n which added to its sum of digits gives 55122221130.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39597 + ... + 334383.

It is an arithmetic number, because the mean of its divisors is an integer number (2164923072).

Almost surely, 2^55122221130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55122221130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69277538304).

55122221130 is an abundant number, since it is smaller than the sum of its proper divisors (83432855478).

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

55122221130 is a wasteful number, since it uses less digits than its factorization.

55122221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295091.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 55122221130 its reverse (3112222155), we get a palindrome (58234443285).

The spelling of 55122221130 in words is "fifty-five billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred thirty".