103320221 has 4 divisors (see below), whose sum is σ = 103391100. Its totient is φ = 103249344.

The previous prime is 103320211. The next prime is 103320223. The reversal of 103320221 is 122023301.

It is a happy number.

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 43428100 + 59892121 = 6590^2 + 7739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103320221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103320196 and 103320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103320223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33206 + ... + 36183.

It is an arithmetic number, because the mean of its divisors is an integer number (25847775).

Almost surely, 2^103320221 is an apocalyptic number.

It is an amenable number.

103320221 is a deficient number, since it is larger than the sum of its proper divisors (70879).

103320221 is an equidigital number, since it uses as much as digits as its factorization.

103320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70878.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 103320221 is about 10164.6554786672. The cubic root of 103320221 is about 469.2400893531.

Adding to 103320221 its reverse (122023301), we get a palindrome (225343522).

The spelling of 103320221 in words is "one hundred three million, three hundred twenty thousand, two hundred twenty-one".