211231120212 has 54 divisors (see below), whose sum is σ = 621120084858. Its totient is φ = 60351748128.

The previous prime is 211231120211. The next prime is 211231120223. The reversal of 211231120212 is 212021132112.

211231120212 is a `hidden beast` number, since 211 + 231 + 12 + 0 + 212 = 666.

211231120212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 195333945156 + 15897175056 = 441966^2 + 126084^2 .

It is a super-2 number, since 2×211231120212² (a number of 23 digits) contains 22 as substring.

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 (211231120211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 59871003 + ... + 59874530.

Almost surely, 2^211231120212 is an apocalyptic number.

It is an amenable number.

211231120212 is an abundant number, since it is smaller than the sum of its proper divisors (409888964646).

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

211231120212 is a wasteful number, since it uses less digits than its factorization.

211231120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119745557 (or 119745545 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211231120212 its reverse (212021132112), we get a palindrome (423252252324).

The spelling of 211231120212 in words is "two hundred eleven billion, two hundred thirty-one million, one hundred twenty thousand, two hundred twelve".