212011021112 has 64 divisors (see below), whose sum is σ = 461191760640. Its totient is φ = 90300198400.

The previous prime is 212011021097. The next prime is 212011021127. The reversal of 212011021112 is 211120110212.

It is an interprime number because it is at equal distance from previous prime (212011021097) and next prime (212011021127).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27437 + ... + 651747.

It is an arithmetic number, because the mean of its divisors is an integer number (7206121260).

Almost surely, 2^212011021112 is an apocalyptic number.

212011021112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212011021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230595880320).

212011021112 is an abundant number, since it is smaller than the sum of its proper divisors (249180739528).

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

212011021112 is a wasteful number, since it uses less digits than its factorization.

212011021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624572 (or 624568 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212011021112 its reverse (211120110212), we get a palindrome (423131131324).

The spelling of 212011021112 in words is "two hundred twelve billion, eleven million, twenty-one thousand, one hundred twelve".