99111111111212 has 12 divisors (see below), whose sum is σ = 176384180791560. Its totient is φ = 48715630885056.

The previous prime is 99111111111167. The next prime is 99111111111281. The reversal of 99111111111212 is 21211111111199.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209981167373 + ... + 209981167844.

It is an arithmetic number, because the mean of its divisors is an integer number (14698681732630).

Almost surely, 2^{99111111111212} is an apocalyptic number.

It is an amenable number.

99111111111212 is a deficient number, since it is larger than the sum of its proper divisors (77273069680348).

99111111111212 is a wasteful number, since it uses less digits than its factorization.

99111111111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419962335280 (or 419962335278 counting only the distinct ones).

The product of its digits is 324, while the sum is 32.

The spelling of 99111111111212 in words is "ninety-nine trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, two hundred twelve".