221103401280 has 448 divisors, whose sum is σ = 776909352960. Its totient is φ = 53025325056.

The previous prime is 221103401263. The next prime is 221103401329. The reversal of 221103401280 is 82104301122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 221103401280.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57472317 + ... + 57476163.

Almost surely, 2^221103401280 is an apocalyptic number.

221103401280 is a gapful number since it is divisible by the number (20) 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 221103401280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388454676480).

221103401280 is an abundant number, since it is smaller than the sum of its proper divisors (555805951680).

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

221103401280 is a wasteful number, since it uses less digits than its factorization.

221103401280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046 (or 4036 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 221103401280 in words is "two hundred twenty-one billion, one hundred three million, four hundred one thousand, two hundred eighty".