1211122200012 has 12 divisors (see below), whose sum is σ = 2825951800056. Its totient is φ = 403707400000.

The previous prime is 1211122199999. The next prime is 1211122200019. The reversal of 1211122200012 is 2100022211121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1211122199964 and 1211122200000.

It is not an unprimeable number, because it can be changed into a prime (1211122200019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50463424989 + ... + 50463425012.

It is an arithmetic number, because the mean of its divisors is an integer number (235495983338).

Almost surely, 2^{1211122200012} is an apocalyptic number.

1211122200012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211122200012 is an abundant number, since it is smaller than the sum of its proper divisors (1614829600044).

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

1211122200012 is a wasteful number, since it uses less digits than its factorization.

1211122200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100926850008 (or 100926850006 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211122200012 its reverse (2100022211121), we get a palindrome (3311144411133).

The spelling of 1211122200012 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred thousand, twelve".