221031002280 has 128 divisors (see below), whose sum is σ = 724372346880. Its totient is φ = 53509336320.

The previous prime is 221031002279. The next prime is 221031002333. The reversal of 221031002280 is 82200130122.

It is a happy number.

221031002280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 844477 + ... + 1074803.

It is an arithmetic number, because the mean of its divisors is an integer number (5659158960).

Almost surely, 2^221031002280 is an apocalyptic number.

221031002280 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 221031002280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362186173440).

221031002280 is an abundant number, since it is smaller than the sum of its proper divisors (503341344600).

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

221031002280 is a wasteful number, since it uses less digits than its factorization.

221031002280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231079 (or 231075 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The spelling of 221031002280 in words is "two hundred twenty-one billion, thirty-one million, two thousand, two hundred eighty".