211210111210212 has 72 divisors (see below), whose sum is σ = 565392620474136. Its totient is φ = 66250863673344.

The previous prime is 211210111210211. The next prime is 211210111210213. The reversal of 211210111210212 is 212012111012112.

It is a happy number.

211210111210212 is a `hidden beast` number, since 21 + 1 + 210 + 1 + 11 + 210 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (211210111210211) and next prime (211210111210213).

It can be written as a sum of positive squares in 4 ways, for example, as 22422346330176 + 188787764880036 = 4735224^2 + 13740006^2 .

It is a super-2 number, since 2×211210111210212² (a number of 29 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (211210111210211) 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, 25343373 + ... + 32629844.

It is an arithmetic number, because the mean of its divisors is an integer number (7852675284363).

Almost surely, 2^{211210111210212} is an apocalyptic number.

It is an amenable number.

211210111210212 is an abundant number, since it is smaller than the sum of its proper divisors (354182509263924).

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

211210111210212 is a wasteful number, since it uses less digits than its factorization.

211210111210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57979197 (or 57979192 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211210111210212 its reverse (212012111012112), we get a palindrome (423222222222324).

The spelling of 211210111210212 in words is "two hundred eleven trillion, two hundred ten billion, one hundred eleven million, two hundred ten thousand, two hundred twelve".