99109121012 has 12 divisors (see below), whose sum is σ = 189208322016. Its totient is φ = 45049600440.

The previous prime is 99109121011. The next prime is 99109121039. The reversal of 99109121012 is 21012190199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99109121011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1126239968 + ... + 1126240055.

It is an arithmetic number, because the mean of its divisors is an integer number (15767360168).

Almost surely, 2^99109121012 is an apocalyptic number.

It is an amenable number.

99109121012 is a deficient number, since it is larger than the sum of its proper divisors (90099201004).

99109121012 is a wasteful number, since it uses less digits than its factorization.

99109121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252480038 (or 2252480036 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 99109121012 in words is "ninety-nine billion, one hundred nine million, one hundred twenty-one thousand, twelve".