12210121212 has 48 divisors (see below), whose sum is σ = 29295346080. Its totient is φ = 3955295232.

The previous prime is 12210121199. The next prime is 12210121229. The reversal of 12210121212 is 21212101221.

It is a junction number, because it is equal to n+sod(n) for n = 12210121191 and 12210121200.

It is a congruent number.

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, 364464 + ... + 396552.

It is an arithmetic number, because the mean of its divisors is an integer number (610319710).

Almost surely, 2^12210121212 is an apocalyptic number.

12210121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12210121212 is an abundant number, since it is smaller than the sum of its proper divisors (17085224868).

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

12210121212 is a wasteful number, since it uses less digits than its factorization.

12210121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32990 (or 32988 counting only the distinct ones).

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

Adding to 12210121212 its reverse (21212101221), we get a palindrome (33422222433).

The spelling of 12210121212 in words is "twelve billion, two hundred ten million, one hundred twenty-one thousand, two hundred twelve".