12212011111212 has 72 divisors (see below), whose sum is σ = 33803589980160. Its totient is φ = 3686538637920.

The previous prime is 12212011111211. The next prime is 12212011111213. The reversal of 12212011111212 is 21211111021221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12212011111211) and next prime (12212011111213).

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 (12212011111211) 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, 58524012 + ... + 58732307.

It is an arithmetic number, because the mean of its divisors is an integer number (469494305280).

Almost surely, 2^{12212011111212} is an apocalyptic number.

12212011111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12212011111212 is an abundant number, since it is smaller than the sum of its proper divisors (21591578868948).

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

12212011111212 is a wasteful number, since it uses less digits than its factorization.

12212011111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117256603 (or 117256598 counting only the distinct ones).

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

Adding to 12212011111212 its reverse (21211111021221), we get a palindrome (33423122132433).

The spelling of 12212011111212 in words is "twelve trillion, two hundred twelve billion, eleven million, one hundred eleven thousand, two hundred twelve".