221201110221000 has 1536 divisors, whose sum is σ = 905933187993600. Its totient is φ = 43847283916800.

The previous prime is 221201110220969. The next prime is 221201110221041. The reversal of 221201110221000 is 122011102122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 37346124039 + ... + 37346129961.

It is an arithmetic number, because the mean of its divisors is an integer number (589800252600).

Almost surely, 2^{221201110221000} is an apocalyptic number.

221201110221000 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 221201110221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452966593996800).

221201110221000 is an abundant number, since it is smaller than the sum of its proper divisors (684732077772600).

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

221201110221000 is a wasteful number, since it uses less digits than its factorization.

221201110221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6616 (or 6589 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221201110221000 its reverse (122011102122), we get a palindrome (221323121323122).

The spelling of 221201110221000 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred ten million, two hundred twenty-one thousand".