999804052212 has 96 divisors (see below), whose sum is σ = 2696475048960. Its totient is φ = 282425633280.

The previous prime is 999804052193. The next prime is 999804052213. The reversal of 999804052212 is 212250408999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999804052213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2636263 + ... + 2991569.

It is an arithmetic number, because the mean of its divisors is an integer number (28088281760).

Almost surely, 2^999804052212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999804052212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348237524480).

999804052212 is an abundant number, since it is smaller than the sum of its proper divisors (1696670996748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999804052212 is a wasteful number, since it uses less digits than its factorization.

999804052212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355701 (or 355699 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 999804052212 in words is "nine hundred ninety-nine billion, eight hundred four million, fifty-two thousand, two hundred twelve".