102221010 has 48 divisors (see below), whose sum is σ = 272966616. Its totient is φ = 26521344.

The previous prime is 102220997. The next prime is 102221071. The reversal of 102221010 is 10122201.

It can be written as a sum of positive squares in 4 ways, for example, as 80514729 + 21706281 = 8973^2 + 4659^2 .

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 = 102220983 and 102221001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12019 + ... + 18678.

Almost surely, 2^102221010 is an apocalyptic number.

102221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102221010 is an abundant number, since it is smaller than the sum of its proper divisors (170745606).

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

102221010 is a wasteful number, since it uses less digits than its factorization.

102221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30747 (or 30744 counting only the distinct ones).

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

The square root of 102221010 is about 10110.4406432163. The cubic root of 102221010 is about 467.5700906282.

Adding to 102221010 its reverse (10122201), we get a palindrome (112343211).

The spelling of 102221010 in words is "one hundred two million, two hundred twenty-one thousand, ten".