1021244109 has 16 divisors (see below), whose sum is σ = 1394798592. Its totient is φ = 664293168.

The previous prime is 1021244099. The next prime is 1021244123. The reversal of 1021244109 is 9014421201.

It is not a de Polignac number, because 1021244109 - 2⁴ = 1021244093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021244909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136582 + ... + 143864.

It is an arithmetic number, because the mean of its divisors is an integer number (87174912).

Almost surely, 2^1021244109 is an apocalyptic number.

It is an amenable number.

1021244109 is a deficient number, since it is larger than the sum of its proper divisors (373554483).

1021244109 is a wasteful number, since it uses less digits than its factorization.

1021244109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8416.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1021244109 is about 31956.9101916941. The cubic root of 1021244109 is about 1007.0318074516.

The spelling of 1021244109 in words is "one billion, twenty-one million, two hundred forty-four thousand, one hundred nine".