12121012212 has 12 divisors (see below), whose sum is σ = 28282361856. Its totient is φ = 4040337400.

The previous prime is 12121012201. The next prime is 12121012279. The reversal of 12121012212 is 21221012121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12121012191 and 12121012200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505042164 + ... + 505042187.

It is an arithmetic number, because the mean of its divisors is an integer number (2356863488).

Almost surely, 2^12121012212 is an apocalyptic number.

12121012212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12121012212 is an abundant number, since it is smaller than the sum of its proper divisors (16161349644).

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

12121012212 is a wasteful number, since it uses less digits than its factorization.

12121012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010084358 (or 1010084356 counting only the distinct ones).

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

Adding to 12121012212 its reverse (21221012121), we get a palindrome (33342024333).

Subtracting 12121012212 from its reverse (21221012121), we obtain a palindrome (9099999909).

The spelling of 12121012212 in words is "twelve billion, one hundred twenty-one million, twelve thousand, two hundred twelve".