999122220211121 has 8 divisors (see below), whose sum is σ = 1000261497271680. Its totient is φ = 997983056397888.

The previous prime is 999122220211079. The next prime is 999122220211127. The reversal of 999122220211121 is 121112022221999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999122220211121 - 2⁶ = 999122220211057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999122220211127) 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, 10650536 + ... + 45953001.

It is an arithmetic number, because the mean of its divisors is an integer number (125032687158960).

Almost surely, 2^{999122220211121} is an apocalyptic number.

It is an amenable number.

999122220211121 is a deficient number, since it is larger than the sum of its proper divisors (1139277060559).

999122220211121 is a wasteful number, since it uses less digits than its factorization.

999122220211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56623663.

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

The spelling of 999122220211121 in words is "nine hundred ninety-nine trillion, one hundred twenty-two billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".