221999034444 has 288 divisors, whose sum is σ = 615411675648. Its totient is φ = 62010009600.

The previous prime is 221999034437. The next prime is 221999034463. The reversal of 221999034444 is 444430999122.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 345254787 + ... + 345255429.

It is an arithmetic number, because the mean of its divisors is an integer number (2136846096).

Almost surely, 2^221999034444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221999034444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307705837824).

221999034444 is an abundant number, since it is smaller than the sum of its proper divisors (393412641204).

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

221999034444 is a wasteful number, since it uses less digits than its factorization.

221999034444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 221999034444 in words is "two hundred twenty-one billion, nine hundred ninety-nine million, thirty-four thousand, four hundred forty-four".