121200111110012 has 24 divisors (see below), whose sum is σ = 231385617990912. Its totient is φ = 55090105383600.

The previous prime is 121200111109969. The next prime is 121200111110027. The reversal of 121200111110012 is 210011111002121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18480998 + ... + 24165005.

It is an arithmetic number, because the mean of its divisors is an integer number (9641067416288).

Almost surely, 2^{121200111110012} is an apocalyptic number.

It is an amenable number.

121200111110012 is a deficient number, since it is larger than the sum of its proper divisors (110185506880900).

121200111110012 is a wasteful number, since it uses less digits than its factorization.

121200111110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42710609 (or 42710607 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121200111110012 its reverse (210011111002121), we get a palindrome (331211222112133).

The spelling of 121200111110012 in words is "one hundred twenty-one trillion, two hundred billion, one hundred eleven million, one hundred ten thousand, twelve".