103440221 has 2 divisors, whose sum is σ = 103440222. Its totient is φ = 103440220.

The previous prime is 103440209. The next prime is 103440229. The reversal of 103440221 is 122044301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90516196 + 12924025 = 9514^2 + 3595^2 .

It is a cyclic number.

It is not a de Polignac number, because 103440221 - 2¹⁰ = 103439197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103440221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103440229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51720110 + 51720111.

It is an arithmetic number, because the mean of its divisors is an integer number (51720111).

Almost surely, 2^103440221 is an apocalyptic number.

It is an amenable number.

103440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

103440221 is an equidigital number, since it uses as much as digits as its factorization.

103440221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 103440221 is about 10170.5565727742. The cubic root of 103440221 is about 469.4216834448.

Adding to 103440221 its reverse (122044301), we get a palindrome (225484522).

It can be divided in two parts, 1034 and 40221, that multiplied together give a palindrome (41588514).

The spelling of 103440221 in words is "one hundred three million, four hundred forty thousand, two hundred twenty-one".