12210111211212 has 48 divisors (see below), whose sum is σ = 32747424712800. Its totient is φ = 3929690963520.

The previous prime is 12210111211163. The next prime is 12210111211229. The reversal of 12210111211212 is 21211211101221.

It is a happy number.

12210111211212 is a `hidden beast` number, since 122 + 10 + 111 + 211 + 212 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1949248339 + ... + 1949254602.

It is an arithmetic number, because the mean of its divisors is an integer number (682238014850).

Almost surely, 2^{12210111211212} is an apocalyptic number.

12210111211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12210111211212 is an abundant number, since it is smaller than the sum of its proper divisors (20537313501588).

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

12210111211212 is a wasteful number, since it uses less digits than its factorization.

12210111211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898502983 (or 3898502975 counting only the distinct ones).

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

Adding to 12210111211212 its reverse (21211211101221), we get a palindrome (33421322312433).

The spelling of 12210111211212 in words is "twelve trillion, two hundred ten billion, one hundred eleven million, two hundred eleven thousand, two hundred twelve".