121200111212 has 12 divisors (see below), whose sum is σ = 212507300376. Its totient is φ = 60483739680.

The previous prime is 121200111181. The next prime is 121200111233. The reversal of 121200111212 is 212111002121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29076638 + ... + 29080805.

It is an arithmetic number, because the mean of its divisors is an integer number (17708941698).

Almost surely, 2^121200111212 is an apocalyptic number.

It is an amenable number.

121200111212 is a deficient number, since it is larger than the sum of its proper divisors (91307189164).

121200111212 is a wasteful number, since it uses less digits than its factorization.

121200111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58157968 (or 58157966 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121200111212 its reverse (212111002121), we get a palindrome (333311113333).

The spelling of 121200111212 in words is "one hundred twenty-one billion, two hundred million, one hundred eleven thousand, two hundred twelve".