2102111212212 has 144 divisors (see below), whose sum is σ = 5891273990784. Its totient is φ = 626653440000.

The previous prime is 2102111212183. The next prime is 2102111212261. The reversal of 2102111212212 is 2122121112012.

2102111212212 is a `hidden beast` number, since 210 + 21 + 11 + 212 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12767212 + ... + 12930812.

It is an arithmetic number, because the mean of its divisors is an integer number (40911624936).

Almost surely, 2^{2102111212212} is an apocalyptic number.

2102111212212 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 2102111212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2945636995392).

2102111212212 is an abundant number, since it is smaller than the sum of its proper divisors (3789162778572).

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

2102111212212 is a wasteful number, since it uses less digits than its factorization.

2102111212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164150 (or 164145 counting only the distinct ones).

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

Adding to 2102111212212 its reverse (2122121112012), we get a palindrome (4224232324224).

The spelling of 2102111212212 in words is "two trillion, one hundred two billion, one hundred eleven million, two hundred twelve thousand, two hundred twelve".