121211201100012 has 48 divisors (see below), whose sum is σ = 287478775180800. Its totient is φ = 39739145348160.

The previous prime is 121211201100001. The next prime is 121211201100079. The reversal of 121211201100012 is 210001102112121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121211201099964 and 121211201100000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8416939 + ... + 17699357.

It is an arithmetic number, because the mean of its divisors is an integer number (5989141149600).

Almost surely, 2^{121211201100012} is an apocalyptic number.

121211201100012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121211201100012 is an abundant number, since it is smaller than the sum of its proper divisors (166267574080788).

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

121211201100012 is a wasteful number, since it uses less digits than its factorization.

121211201100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300326 (or 9300324 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121211201100012 its reverse (210001102112121), we get a palindrome (331212303212133).

The spelling of 121211201100012 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred one million, one hundred thousand, twelve".