211020120012 has 96 divisors (see below), whose sum is σ = 561722261184. Its totient is φ = 61079961600.

The previous prime is 211020120007. The next prime is 211020120043. The reversal of 211020120012 is 210021020112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 211020120012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5712562 + ... + 5749382.

It is an arithmetic number, because the mean of its divisors is an integer number (5851273554).

Almost surely, 2^211020120012 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 211020120012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280861130592).

211020120012 is an abundant number, since it is smaller than the sum of its proper divisors (350702141172).

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

211020120012 is a wasteful number, since it uses less digits than its factorization.

211020120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39019 (or 39017 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211020120012 its reverse (210021020112), we get a palindrome (421041140124).

The spelling of 211020120012 in words is "two hundred eleven billion, twenty million, one hundred twenty thousand, twelve".