121100111211212 has 96 divisors (see below), whose sum is σ = 262397201633280. Its totient is φ = 47752429919040.

The previous prime is 121100111211169. The next prime is 121100111211293. The reversal of 121100111211212 is 212112111001121.

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 31 ways as a sum of consecutive naturals, for example, 21395258 + ... + 26456705.

It is an arithmetic number, because the mean of its divisors is an integer number (2733304183680).

Almost surely, 2^{121100111211212} is an apocalyptic number.

It is an amenable number.

121100111211212 is an abundant number, since it is smaller than the sum of its proper divisors (141297090422068).

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

121100111211212 is a wasteful number, since it uses less digits than its factorization.

121100111211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47852131 (or 47852129 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121100111211212 its reverse (212112111001121), we get a palindrome (333212222212333).

The spelling of 121100111211212 in words is "one hundred twenty-one trillion, one hundred billion, one hundred eleven million, two hundred eleven thousand, two hundred twelve".