221230188817044 has 96 divisors (see below), whose sum is σ = 569146202419200. Its totient is φ = 66323910620160.

The previous prime is 221230188817039. The next prime is 221230188817069. The reversal of 221230188817044 is 440718881032122.

It is a super-2 number, since 2×221230188817044² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 31636767 + ... + 37991385.

It is an arithmetic number, because the mean of its divisors is an integer number (5928606275200).

Almost surely, 2^{221230188817044} 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 221230188817044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284573101209600).

221230188817044 is an abundant number, since it is smaller than the sum of its proper divisors (347916013602156).

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

221230188817044 is a wasteful number, since it uses less digits than its factorization.

221230188817044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6357453 (or 6357451 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 51.

The spelling of 221230188817044 in words is "two hundred twenty-one trillion, two hundred thirty billion, one hundred eighty-eight million, eight hundred seventeen thousand, forty-four".