121200020000012 has 12 divisors (see below), whose sum is σ = 212865739099440. Its totient is φ = 60381237400176.

The previous prime is 121200019999979. The next prime is 121200020000039. The reversal of 121200020000012 is 210000020002121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121200019999948 and 121200020000002.

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, 54693148712 + ... + 54693150927.

It is an arithmetic number, because the mean of its divisors is an integer number (17738811591620).

Almost surely, 2^{121200020000012} is an apocalyptic number.

It is an amenable number.

121200020000012 is a deficient number, since it is larger than the sum of its proper divisors (91665719099428).

121200020000012 is a wasteful number, since it uses less digits than its factorization.

121200020000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109386299920 (or 109386299918 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121200020000012 its reverse (210000020002121), we get a palindrome (331200040002133).

The spelling of 121200020000012 in words is "one hundred twenty-one trillion, two hundred billion, twenty million, twelve", and thus it is an aban number.