1012221109 has 2 divisors, whose sum is σ = 1012221110. Its totient is φ = 1012221108.

The previous prime is 1012221071. The next prime is 1012221113. The reversal of 1012221109 is 9011222101.

It is a happy number.

1012221109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 992061009 + 20160100 = 31497^2 + 4490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012221109 - 2⁷ = 1012220981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012221809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506110554 + 506110555.

It is an arithmetic number, because the mean of its divisors is an integer number (506110555).

Almost surely, 2^1012221109 is an apocalyptic number.

It is an amenable number.

1012221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012221109 is an equidigital number, since it uses as much as digits as its factorization.

1012221109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1012221109 is about 31815.4225023022. The cubic root of 1012221109 is about 1004.0572197062.

The spelling of 1012221109 in words is "one billion, twelve million, two hundred twenty-one thousand, one hundred nine".