1222122200121 has 48 divisors (see below), whose sum is σ = 1910030528640. Its totient is φ = 750371247360.

The previous prime is 1222122200071. The next prime is 1222122200153. The reversal of 1222122200121 is 1210022212221.

It is a happy number.

1222122200121 is a `hidden beast` number, since 1 + 222 + 122 + 200 + 121 = 666.

It is not a de Polignac number, because 1222122200121 - 2¹⁸ = 1222121937977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1222122200094 and 1222122200103.

It is not an unprimeable number, because it can be changed into a prime (1222122200191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7467156 + ... + 7629066.

It is an arithmetic number, because the mean of its divisors is an integer number (39792302680).

Almost surely, 2^{1222122200121} is an apocalyptic number.

It is an amenable number.

1222122200121 is a deficient number, since it is larger than the sum of its proper divisors (687908328519).

1222122200121 is a wasteful number, since it uses less digits than its factorization.

1222122200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163166 (or 163163 counting only the distinct ones).

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

Adding to 1222122200121 its reverse (1210022212221), we get a palindrome (2432144412342).

The spelling of 1222122200121 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred thousand, one hundred twenty-one".