2012111212212 has 72 divisors (see below), whose sum is σ = 5174028830880. Its totient is φ = 659125224000.

The previous prime is 2012111212159. The next prime is 2012111212213. The reversal of 2012111212212 is 2122121112102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012111212213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6568462 + ... + 6867962.

It is an arithmetic number, because the mean of its divisors is an integer number (71861511540).

Almost surely, 2^{2012111212212} 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 2012111212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2587014415440).

2012111212212 is an abundant number, since it is smaller than the sum of its proper divisors (3161917618668).

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

2012111212212 is a wasteful number, since it uses less digits than its factorization.

2012111212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302733 (or 302728 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2012111212212 its reverse (2122121112102), we get a palindrome (4134232324314).

The spelling of 2012111212212 in words is "two trillion, twelve billion, one hundred eleven million, two hundred twelve thousand, two hundred twelve".