2102111221212 has 48 divisors (see below), whose sum is σ = 5539260916000. Its totient is φ = 689216791680.

The previous prime is 2102111221211. The next prime is 2102111221261. The reversal of 2102111221212 is 2121221112012.

2102111221212 is a `hidden beast` number, since 21 + 0 + 211 + 1 + 221 + 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 not an unprimeable number, because it can be changed into a prime (2102111221211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159534337 + ... + 159547512.

Almost surely, 2^{2102111221212} is an apocalyptic number.

It is an amenable number.

2102111221212 is an abundant number, since it is smaller than the sum of its proper divisors (3437149694788).

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

2102111221212 is a wasteful number, since it uses less digits than its factorization.

2102111221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319081923 (or 319081915 counting only the distinct ones).

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

Adding to 2102111221212 its reverse (2121221112012), we get a palindrome (4223332333224).

The spelling of 2102111221212 in words is "two trillion, one hundred two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".