211211111104 has 28 divisors (see below), whose sum is σ = 478996627984. Its totient is φ = 90519047424.

The previous prime is 211211111099. The next prime is 211211111113. The reversal of 211211111104 is 401111112112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-3 number, since 3×211211111104³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235726239 + ... + 235727134.

It is an arithmetic number, because the mean of its divisors is an integer number (17107022428).

Almost surely, 2^211211111104 is an apocalyptic number.

It is an amenable number.

211211111104 is an abundant number, since it is smaller than the sum of its proper divisors (267785516880).

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

211211111104 is an equidigital number, since it uses as much as digits as its factorization.

211211111104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471453392 (or 471453382 counting only the distinct ones).

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

Adding to 211211111104 its reverse (401111112112), we get a palindrome (612322223216).

The spelling of 211211111104 in words is "two hundred eleven billion, two hundred eleven million, one hundred eleven thousand, one hundred four".