221150388888 has 512 divisors, whose sum is σ = 765434880000. Its totient is φ = 58161369600.

The previous prime is 221150388883. The next prime is 221150388889. The reversal of 221150388888 is 888883051122.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221150388883) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 81573853 + ... + 81576563.

It is an arithmetic number, because the mean of its divisors is an integer number (1494990000).

Almost surely, 2^221150388888 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 221150388888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382717440000).

221150388888 is an abundant number, since it is smaller than the sum of its proper divisors (544284491112).

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

221150388888 is a wasteful number, since it uses less digits than its factorization.

221150388888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908 (or 2898 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 54.

The spelling of 221150388888 in words is "two hundred twenty-one billion, one hundred fifty million, three hundred eighty-eight thousand, eight hundred eighty-eight".