103144421 has 2 divisors, whose sum is σ = 103144422. Its totient is φ = 103144420.

The previous prime is 103144417. The next prime is 103144441. The reversal of 103144421 is 124441301.

It is an a-pointer prime, because the next prime (103144441) can be obtained adding 103144421 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65383396 + 37761025 = 8086^2 + 6145^2 .

It is a cyclic number.

It is not a de Polignac number, because 103144421 - 2² = 103144417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103144393 and 103144402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103144441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51572210 + 51572211.

It is an arithmetic number, because the mean of its divisors is an integer number (51572211).

Almost surely, 2^103144421 is an apocalyptic number.

It is an amenable number.

103144421 is a deficient number, since it is larger than the sum of its proper divisors (1).

103144421 is an equidigital number, since it uses as much as digits as its factorization.

103144421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 103144421 is about 10156.0041847175. The cubic root of 103144421 is about 468.9737999527.

Adding to 103144421 its reverse (124441301), we get a palindrome (227585722).

The spelling of 103144421 in words is "one hundred three million, one hundred forty-four thousand, four hundred twenty-one".