103421221 has 4 divisors (see below), whose sum is σ = 106987500. Its totient is φ = 99854944.

The previous prime is 103421203. The next prime is 103421231. The reversal of 103421221 is 122124301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30404196 + 73017025 = 5514^2 + 8545^2 .

It is a cyclic number.

It is not a de Polignac number, because 103421221 - 2⁵ = 103421189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103421195 and 103421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103421231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1783096 + ... + 1783153.

It is an arithmetic number, because the mean of its divisors is an integer number (26746875).

Almost surely, 2^103421221 is an apocalyptic number.

It is an amenable number.

103421221 is a deficient number, since it is larger than the sum of its proper divisors (3566279).

103421221 is an equidigital number, since it uses as much as digits as its factorization.

103421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566278.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 103421221 is about 10169.6224610356. The cubic root of 103421221 is about 469.3929404084.

Adding to 103421221 its reverse (122124301), we get a palindrome (225545522).

The spelling of 103421221 in words is "one hundred three million, four hundred twenty-one thousand, two hundred twenty-one".