491211112112 has 160 divisors (see below), whose sum is σ = 1146383960064. Its totient is φ = 199538380800.

The previous prime is 491211112081. The next prime is 491211112129. The reversal of 491211112112 is 211211112194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22448537 + ... + 22470407.

Almost surely, 2^491211112112 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 491211112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573191980032).

491211112112 is an abundant number, since it is smaller than the sum of its proper divisors (655172847952).

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

491211112112 is a wasteful number, since it uses less digits than its factorization.

491211112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22067 (or 22061 counting only the distinct ones).

The product of its digits is 288, while the sum is 26.

The spelling of 491211112112 in words is "four hundred ninety-one billion, two hundred eleven million, one hundred twelve thousand, one hundred twelve".