12211201212 has 72 divisors (see below), whose sum is σ = 33517244880. Its totient is φ = 3449698560.

The previous prime is 12211201199. The next prime is 12211201213. The reversal of 12211201212 is 21210211221.

It is a super-2 number, since 2×12211201212² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211201191 and 12211201200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211201213) 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, 64339 + ... + 169002.

It is an arithmetic number, because the mean of its divisors is an integer number (465517290).

Almost surely, 2^12211201212 is an apocalyptic number.

12211201212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12211201212 is an abundant number, since it is smaller than the sum of its proper divisors (21306043668).

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

12211201212 is a wasteful number, since it uses less digits than its factorization.

12211201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233451 (or 233442 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211201212 its reverse (21210211221), we get a palindrome (33421412433).

The spelling of 12211201212 in words is "twelve billion, two hundred eleven million, two hundred one thousand, two hundred twelve".