1212212201121 has 12 divisors (see below), whose sum is σ = 1807456185600. Its totient is φ = 782072387640.

The previous prime is 1212212201099. The next prime is 1212212201129. The reversal of 1212212201121 is 1211022122121.

1212212201121 is a `hidden beast` number, since 121 + 221 + 2 + 201 + 121 = 666.

It is not a de Polignac number, because 1212212201121 - 2⁷ = 1212212200993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212212201094 and 1212212201103.

It is not an unprimeable number, because it can be changed into a prime (1212212201129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2172423021 + ... + 2172423578.

It is an arithmetic number, because the mean of its divisors is an integer number (150621348800).

Almost surely, 2^{1212212201121} is an apocalyptic number.

It is an amenable number.

1212212201121 is a deficient number, since it is larger than the sum of its proper divisors (595243984479).

1212212201121 is a wasteful number, since it uses less digits than its factorization.

1212212201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344846636 (or 4344846633 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212212201121 its reverse (1211022122121), we get a palindrome (2423234323242).

The spelling of 1212212201121 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred one thousand, one hundred twenty-one".