211110021012 has 96 divisors (see below), whose sum is σ = 551521474560. Its totient is φ = 62309617920.

The previous prime is 211110020999. The next prime is 211110021077. The reversal of 211110021012 is 210120011112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 653013 + ... + 921219.

It is an arithmetic number, because the mean of its divisors is an integer number (5745015360).

Almost surely, 2^211110021012 is an apocalyptic number.

211110021012 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 211110021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275760737280).

211110021012 is an abundant number, since it is smaller than the sum of its proper divisors (340411453548).

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

211110021012 is a wasteful number, since it uses less digits than its factorization.

211110021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268381 (or 268379 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211110021012 its reverse (210120011112), we get a palindrome (421230032124).

The spelling of 211110021012 in words is "two hundred eleven billion, one hundred ten million, twenty-one thousand, twelve".