12121210012 has 12 divisors (see below), whose sum is σ = 21215788776. Its totient is φ = 6059556080.

The previous prime is 12121210009. The next prime is 12121210039. The reversal of 12121210012 is 21001212121.

It is a junction number, because it is equal to n+sod(n) for n = 12121209974 and 12121210001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235939 + ... + 282682.

It is an arithmetic number, because the mean of its divisors is an integer number (1767982398).

Almost surely, 2^12121210012 is an apocalyptic number.

It is an amenable number.

12121210012 is a deficient number, since it is larger than the sum of its proper divisors (9094578764).

12121210012 is a wasteful number, since it uses less digits than its factorization.

12121210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524468 (or 524466 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12121210012 its reverse (21001212121), we get a palindrome (33122422133).

It can be divided in two parts, 12121 and 210012, that multiplied together give a palindrome (2545555452).

The spelling of 12121210012 in words is "twelve billion, one hundred twenty-one million, two hundred ten thousand, twelve".