1212201100012 has 24 divisors (see below), whose sum is σ = 2424600491040. Its totient is φ = 519472266240.

The previous prime is 1212201099971. The next prime is 1212201100013. The reversal of 1212201100012 is 2100011022121.

It is a junction number, because it is equal to n+sod(n) for n = 1212201099965 and 1212201100001.

It is not an unprimeable number, because it can be changed into a prime (1212201100013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420789 + ... + 2107852.

It is an arithmetic number, because the mean of its divisors is an integer number (101025020460).

Almost surely, 2^{1212201100012} is an apocalyptic number.

It is an amenable number.

1212201100012 is an abundant number, since it is smaller than the sum of its proper divisors (1212399391028).

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

1212201100012 is a wasteful number, since it uses less digits than its factorization.

1212201100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540921 (or 3540919 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212201100012 its reverse (2100011022121), we get a palindrome (3312212122133).

The spelling of 1212201100012 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred thousand, twelve".