103812221 has 2 divisors, whose sum is σ = 103812222. Its totient is φ = 103812220.

The previous prime is 103812197. The next prime is 103812229. The reversal of 103812221 is 122218301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 35832196 = 8245^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 103812221 - 2⁶ = 103812157 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 103812193 and 103812202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103812229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51906110 + 51906111.

It is an arithmetic number, because the mean of its divisors is an integer number (51906111).

Almost surely, 2^103812221 is an apocalyptic number.

It is an amenable number.

103812221 is a deficient number, since it is larger than the sum of its proper divisors (1).

103812221 is an equidigital number, since it uses as much as digits as its factorization.

103812221 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 20.

The square root of 103812221 is about 10188.8282447002. The cubic root of 103812221 is about 469.9837341587.

The spelling of 103812221 in words is "one hundred three million, eight hundred twelve thousand, two hundred twenty-one".