103066021 has 2 divisors, whose sum is σ = 103066022. Its totient is φ = 103066020.

The previous prime is 103066009. The next prime is 103066037. The reversal of 103066021 is 120660301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57988225 + 45077796 = 7615^2 + 6714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103066021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103066021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103066001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51533010 + 51533011.

It is an arithmetic number, because the mean of its divisors is an integer number (51533011).

Almost surely, 2^103066021 is an apocalyptic number.

It is an amenable number.

103066021 is a deficient number, since it is larger than the sum of its proper divisors (1).

103066021 is an equidigital number, since it uses as much as digits as its factorization.

103066021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 103066021 is about 10152.1436652561. The cubic root of 103066021 is about 468.8549476187.

The spelling of 103066021 in words is "one hundred three million, sixty-six thousand, twenty-one".