2111221120212 has 72 divisors (see below), whose sum is σ = 5513753446656. Its totient is φ = 680620169664.

The previous prime is 2111221120201. The next prime is 2111221120219. The reversal of 2111221120212 is 2120211221112.

2111221120212 is a `hidden beast` number, since 2 + 111 + 221 + 120 + 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 (2111221120219) 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, 4523068 + ... + 4967955.

Almost surely, 2^{2111221120212} is an apocalyptic number.

It is an amenable number.

2111221120212 is an abundant number, since it is smaller than the sum of its proper divisors (3402532326444).

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

2111221120212 is a wasteful number, since it uses less digits than its factorization.

2111221120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9491237 (or 9491232 counting only the distinct ones).

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

Adding to 2111221120212 its reverse (2120211221112), we get a palindrome (4231432341324).

The spelling of 2111221120212 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twelve".