103520221 has 16 divisors (see below), whose sum is σ = 121651200. Its totient is φ = 86245488.

The previous prime is 103520213. The next prime is 103520237. The reversal of 103520221 is 122025301.

It is not a de Polignac number, because 103520221 - 2³ = 103520213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103520195 and 103520204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103520321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71220 + ... + 72658.

It is an arithmetic number, because the mean of its divisors is an integer number (7603200).

Almost surely, 2^103520221 is an apocalyptic number.

It is an amenable number.

103520221 is a deficient number, since it is larger than the sum of its proper divisors (18130979).

103520221 is a wasteful number, since it uses less digits than its factorization.

103520221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 103520221 is about 10174.4887340839. The cubic root of 103520221 is about 469.5426681617.

Adding to 103520221 its reverse (122025301), we get a palindrome (225545522).

The spelling of 103520221 in words is "one hundred three million, five hundred twenty thousand, two hundred twenty-one".