211211110212 has 48 divisors (see below), whose sum is σ = 506900116800. Its totient is φ = 68410073088.

The previous prime is 211211110207. The next prime is 211211110217. The reversal of 211211110212 is 212011112112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211211110207) and next prime (211211110217).

It is a super-2 number, since 2×211211110212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211110191 and 211211110200.

It is not an unprimeable number, because it can be changed into a prime (211211110217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 960837 + ... + 1160012.

It is an arithmetic number, because the mean of its divisors is an integer number (10560419100).

Almost surely, 2^211211110212 is an apocalyptic number.

It is an amenable number.

211211110212 is an abundant number, since it is smaller than the sum of its proper divisors (295689006588).

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

211211110212 is a wasteful number, since it uses less digits than its factorization.

211211110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121092 (or 2121090 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211211110212 its reverse (212011112112), we get a palindrome (423222222324).

The spelling of 211211110212 in words is "two hundred eleven billion, two hundred eleven million, one hundred ten thousand, two hundred twelve".