221102010 has 96 divisors (see below), whose sum is σ = 599818752. Its totient is φ = 56453760.

The previous prime is 221101981. The next prime is 221102027. The reversal of 221102010 is 10201122.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 221101983 and 221102001.

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, 222615 + ... + 223605.

It is an arithmetic number, because the mean of its divisors is an integer number (6248112).

Almost surely, 2^221102010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221102010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299909376).

221102010 is an abundant number, since it is smaller than the sum of its proper divisors (378716742).

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

221102010 is a wasteful number, since it uses less digits than its factorization.

221102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 221102010 is about 14869.4993190759. The cubic root of 221102010 is about 604.6873689281.

Adding to 221102010 its reverse (10201122), we get a palindrome (231303132).

The spelling of 221102010 in words is "two hundred twenty-one million, one hundred two thousand, ten".