2111210221212 has 48 divisors (see below), whose sum is σ = 5497620414720. Its totient is φ = 700636570416.

The previous prime is 2111210221193. The next prime is 2111210221217. The reversal of 2111210221212 is 2121220121112.

2111210221212 is a `hidden beast` number, since 21 + 1 + 1 + 210 + 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 (2111210221217) 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, 43033288 + ... + 43082319.

It is an arithmetic number, because the mean of its divisors is an integer number (114533758640).

Almost surely, 2^{2111210221212} is an apocalyptic number.

It is an amenable number.

2111210221212 is an abundant number, since it is smaller than the sum of its proper divisors (3386410193508).

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

2111210221212 is a wasteful number, since it uses less digits than its factorization.

2111210221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86115847 (or 86115839 counting only the distinct ones).

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

Adding to 2111210221212 its reverse (2121220121112), we get a palindrome (4232430342324).

The spelling of 2111210221212 in words is "two trillion, one hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, two hundred twelve".