211211211100212 has 72 divisors (see below), whose sum is σ = 553703238090912. Its totient is φ = 70399370008800.

The previous prime is 211211211100177. The next prime is 211211211100243. The reversal of 211211211100212 is 212001112112112.

It is a happy number.

211211211100212 is a `hidden beast` number, since 21 + 1 + 211 + 211 + 10 + 0 + 212 = 666.

It is a super-2 number, since 2×211211211100212² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8957887 + ... + 22420217.

Almost surely, 2^{211211211100212} is an apocalyptic number.

It is an amenable number.

211211211100212 is an abundant number, since it is smaller than the sum of its proper divisors (342492026990700).

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

211211211100212 is a wasteful number, since it uses less digits than its factorization.

211211211100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13478491 (or 13478477 counting only the distinct ones).

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

Adding to 211211211100212 its reverse (212001112112112), we get a palindrome (423212323212324).

The spelling of 211211211100212 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred eleven million, one hundred thousand, two hundred twelve".