102221001 has 8 divisors (see below), whose sum is σ = 151438560. Its totient is φ = 68147316.

The previous prime is 102220997. The next prime is 102221071. The reversal of 102221001 is 100122201.

It is not a de Polignac number, because 102221001 - 2² = 102220997 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (102221071) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1892955 + ... + 1893008.

It is an arithmetic number, because the mean of its divisors is an integer number (18929820).

Almost surely, 2^102221001 is an apocalyptic number.

It is an amenable number.

102221001 is a deficient number, since it is larger than the sum of its proper divisors (49217559).

102221001 is an equidigital number, since it uses as much as digits as its factorization.

102221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785972 (or 3785966 counting only the distinct ones).

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

The square root of 102221001 is about 10110.4401981318. The cubic root of 102221001 is about 467.5700769059.

Adding to 102221001 its reverse (100122201), we get a palindrome (202343202).

The spelling of 102221001 in words is "one hundred two million, two hundred twenty-one thousand, one".