121212021110212 has 24 divisors (see below), whose sum is σ = 227950965081504. Its totient is φ = 56189593629312.

The previous prime is 121212021110197. The next prime is 121212021110221. The reversal of 121212021110212 is 212011120212121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121212021110212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13302456058 + ... + 13302465169.

It is an arithmetic number, because the mean of its divisors is an integer number (9497956878396).

Almost surely, 2^{121212021110212} is an apocalyptic number.

It is an amenable number.

121212021110212 is a deficient number, since it is larger than the sum of its proper divisors (106738943971292).

121212021110212 is a wasteful number, since it uses less digits than its factorization.

121212021110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26604921315 (or 26604921313 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121212021110212 its reverse (212011120212121), we get a palindrome (333223141322333).

The spelling of 121212021110212 in words is "one hundred twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred ten thousand, two hundred twelve".