1309121107 has 32 divisors (see below), whose sum is σ = 1596644352. Its totient is φ = 1049203584.

The previous prime is 1309121101. The next prime is 1309121129. The reversal of 1309121107 is 7011219031.

It is a cyclic number.

It is not a de Polignac number, because 1309121107 - 2¹⁹ = 1308596819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1309121101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1693173 + ... + 1693945.

It is an arithmetic number, because the mean of its divisors is an integer number (49895136).

Almost surely, 2^1309121107 is an apocalyptic number.

1309121107 is a deficient number, since it is larger than the sum of its proper divisors (287523245).

1309121107 is a wasteful number, since it uses less digits than its factorization.

1309121107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 1309121107 is about 36181.7786599830. The cubic root of 1309121107 is about 1093.9394266656.

The spelling of 1309121107 in words is "one billion, three hundred nine million, one hundred twenty-one thousand, one hundred seven".