103011221 has 2 divisors, whose sum is σ = 103011222. Its totient is φ = 103011220.

The previous prime is 103011203. The next prime is 103011239. The reversal of 103011221 is 122110301.

It is a balanced prime because it is at equal distance from previous prime (103011203) and next prime (103011239).

It can be written as a sum of positive squares in only one way, i.e., 97318225 + 5692996 = 9865^2 + 2386^2 .

It is an emirp because it is prime and its reverse (122110301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103011221 - 2⁶ = 103011157 is a prime.

It is a super-2 number, since 2×103011221² = 21222623303821682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103011281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51505610 + 51505611.

It is an arithmetic number, because the mean of its divisors is an integer number (51505611).

Almost surely, 2^103011221 is an apocalyptic number.

It is an amenable number.

103011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

103011221 is an equidigital number, since it uses as much as digits as its factorization.

103011221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 103011221 is about 10149.4443690283. Note that the first 3 decimals coincide. The cubic root of 103011221 is about 468.7718364702.

Adding to 103011221 its reverse (122110301), we get a palindrome (225121522).

It can be divided in two parts, 10301 and 1221, that multiplied together give a palindrome (12577521).

The spelling of 103011221 in words is "one hundred three million, eleven thousand, two hundred twenty-one".