1100030221 has 2 divisors, whose sum is σ = 1100030222. Its totient is φ = 1100030220.

The previous prime is 1100030219. The next prime is 1100030231. The reversal of 1100030221 is 1220300011.

1100030221 = T₂₇₀₇₉ + T₂₇₀₈₀ + T₂₇₀₈₁.

It is an a-pointer prime, because the next prime (1100030231) can be obtained adding 1100030221 to its sum of digits (10).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089726121 + 10304100 = 33011^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100030221 - 2¹ = 1100030219 is a prime.

It is a super-2 number, since 2×1100030221² = 2420132974226617682, which contains 22 as substring.

Together with 1100030219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1100030198 and 1100030207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100030231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550015110 + 550015111.

It is an arithmetic number, because the mean of its divisors is an integer number (550015111).

Almost surely, 2^1100030221 is an apocalyptic number.

1100030221 is the 27081-st centered triangular number.

It is an amenable number.

1100030221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100030221 is an equidigital number, since it uses as much as digits as its factorization.

1100030221 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 10.

The square root of 1100030221 is about 33166.7034991420. The cubic root of 1100030221 is about 1032.2895688660.

Adding to 1100030221 its reverse (1220300011), we get a palindrome (2320330232).

The spelling of 1100030221 in words is "one billion, one hundred million, thirty thousand, two hundred twenty-one".