221211021313110 has 96 divisors (see below), whose sum is σ = 540133840788480. Its totient is φ = 57965195246784.

The previous prime is 221211021313063. The next prime is 221211021313151. The reversal of 221211021313110 is 11313120112122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40198256619 + ... + 40198262121.

It is an arithmetic number, because the mean of its divisors is an integer number (5626394174880).

Almost surely, 2^{221211021313110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221211021313110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270066920394240).

221211021313110 is an abundant number, since it is smaller than the sum of its proper divisors (318922819475370).

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

221211021313110 is an frugal number, since it uses more digits than its factorization.

221211021313110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15202 (or 9699 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 221211021313110 its reverse (11313120112122), we get a palindrome (232524141425232).

The spelling of 221211021313110 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty-one million, three hundred thirteen thousand, one hundred ten".