55110224021200 has 120 divisors (see below), whose sum is σ = 140257829721240. Its totient is φ = 20737441382400.

The previous prime is 55110224021197. The next prime is 55110224021231. The reversal of 55110224021200 is 212042201155.

It can be written as a sum of positive squares in 12 ways, for example, as 5316934999104 + 49793289022096 = 2305848^2 + 7056436^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12265410 + ... + 16144990.

It is an arithmetic number, because the mean of its divisors is an integer number (1168815247677).

Almost surely, 2^{55110224021200} is an apocalyptic number.

55110224021200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55110224021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70128914860620).

55110224021200 is an abundant number, since it is smaller than the sum of its proper divisors (85147605700040).

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

55110224021200 is a wasteful number, since it uses less digits than its factorization.

55110224021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881705 (or 3881694 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 55110224021200 its reverse (212042201155), we get a palindrome (55322266222355).

The spelling of 55110224021200 in words is "fifty-five trillion, one hundred ten billion, two hundred twenty-four million, twenty-one thousand, two hundred".