1200212212122 has 72 divisors (see below), whose sum is σ = 3300026925312. Its totient is φ = 311743429200.

The previous prime is 1200212212099. The next prime is 1200212212201. The reversal of 1200212212122 is 2212122120021.

It is a happy number.

1200212212122 is a `hidden beast` number, since 120 + 0 + 212 + 212 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1200212212095 and 1200212212104.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 61844154 + ... + 61863557.

It is an arithmetic number, because the mean of its divisors is an integer number (45833707296).

Almost surely, 2^{1200212212122} is an apocalyptic number.

1200212212122 is an abundant number, since it is smaller than the sum of its proper divisors (2099814713190).

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

1200212212122 is a wasteful number, since it uses less digits than its factorization.

1200212212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123707744 (or 123707734 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1200212212122 its reverse (2212122120021), we get a palindrome (3412334332143).

The spelling of 1200212212122 in words is "one trillion, two hundred billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-two".