12021211212 has 48 divisors (see below), whose sum is σ = 28174003200. Its totient is φ = 3989322880.

The previous prime is 12021211177. The next prime is 12021211219. The reversal of 12021211212 is 21211212021.

It is a junction number, because it is equal to n+sod(n) for n = 12021211191 and 12021211200.

It is not an unprimeable number, because it can be changed into a prime (12021211219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3095512 + ... + 3099392.

It is an arithmetic number, because the mean of its divisors is an integer number (586958400).

Almost surely, 2^12021211212 is an apocalyptic number.

12021211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021211212 is an abundant number, since it is smaller than the sum of its proper divisors (16152791988).

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

12021211212 is a wasteful number, since it uses less digits than its factorization.

12021211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966 (or 4964 counting only the distinct ones).

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

Adding to 12021211212 its reverse (21211212021), we get a palindrome (33232423233).

The spelling of 12021211212 in words is "twelve billion, twenty-one million, two hundred eleven thousand, two hundred twelve".