891312310212 has 12 divisors (see below), whose sum is σ = 2079728723856. Its totient is φ = 297104103400.

The previous prime is 891312310201. The next prime is 891312310241. The reversal of 891312310212 is 212013213198.

891312310212 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 37138012914 + ... + 37138012937.

It is an arithmetic number, because the mean of its divisors is an integer number (173310726988).

Almost surely, 2^891312310212 is an apocalyptic number.

It is an amenable number.

891312310212 is an abundant number, since it is smaller than the sum of its proper divisors (1188416413644).

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

891312310212 is a wasteful number, since it uses less digits than its factorization.

891312310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74276025858 (or 74276025856 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 891312310212 in words is "eight hundred ninety-one billion, three hundred twelve million, three hundred ten thousand, two hundred twelve".