12211211011212 has 72 divisors (see below), whose sum is σ = 30894602618880. Its totient is φ = 4066795323360.

The previous prime is 12211211011159. The next prime is 12211211011213. The reversal of 12211211011212 is 21211011211221.

It is a happy number.

It is a super-2 number, since 2×12211211011212² (a number of 27 digits) contains 22 as substring.

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 (12211211011213) 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, 210396637 + ... + 210454667.

It is an arithmetic number, because the mean of its divisors is an integer number (429091703040).

Almost surely, 2^{12211211011212} is an apocalyptic number.

12211211011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12211211011212 is an abundant number, since it is smaller than the sum of its proper divisors (18683391607668).

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

12211211011212 is a wasteful number, since it uses less digits than its factorization.

12211211011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63123 (or 63118 counting only the distinct ones).

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

Adding to 12211211011212 its reverse (21211011211221), we get a palindrome (33422222222433).

The spelling of 12211211011212 in words is "twelve trillion, two hundred eleven billion, two hundred eleven million, eleven thousand, two hundred twelve".