999121222110212 has 24 divisors (see below), whose sum is σ = 1778436877812000. Its totient is φ = 490999635950976.

The previous prime is 999121222110191. The next prime is 999121222110227. The reversal of 999121222110212 is 212011222121999.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403271462 + ... + 405741437.

It is an arithmetic number, because the mean of its divisors is an integer number (74101536575500).

Almost surely, 2^{999121222110212} is an apocalyptic number.

It is an amenable number.

999121222110212 is a deficient number, since it is larger than the sum of its proper divisors (779315655701788).

999121222110212 is a wasteful number, since it uses less digits than its factorization.

999121222110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809018195 (or 809018193 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 999121222110212 in words is "nine hundred ninety-nine trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred ten thousand, two hundred twelve".