1309121108 has 24 divisors (see below), whose sum is σ = 2426868864. Its totient is φ = 615766400.

The previous prime is 1309121101. The next prime is 1309121129. The reversal of 1309121108 is 8011219031.

It is a super-2 number, since 2×1309121108² = 3427596150822295328, which contains 22 as substring.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 226373 + ... + 232083.

It is an arithmetic number, because the mean of its divisors is an integer number (101119536).

Almost surely, 2^1309121108 is an apocalyptic number.

It is an amenable number.

1309121108 is a deficient number, since it is larger than the sum of its proper divisors (1117747756).

1309121108 is a wasteful number, since it uses less digits than its factorization.

1309121108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9103 (or 9101 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1309121108 is about 36181.7786738021. The cubic root of 1309121108 is about 1093.9394269441.

The spelling of 1309121108 in words is "one billion, three hundred nine million, one hundred twenty-one thousand, one hundred eight".