1222200122121 has 48 divisors (see below), whose sum is σ = 2041746989568. Its totient is φ = 697458988800.

The previous prime is 1222200122083. The next prime is 1222200122137. The reversal of 1222200122121 is 1212210022221.

It is a happy number.

1222200122121 is a `hidden beast` number, since 1 + 222 + 200 + 1 + 221 + 21 = 666.

It is not a de Polignac number, because 1222200122121 - 2¹¹ = 1222200120073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222200122094 and 1222200122103.

It is not an unprimeable number, because it can be changed into a prime (1222200122141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5268076 + ... + 5495181.

It is an arithmetic number, because the mean of its divisors is an integer number (42536395616).

Almost surely, 2^{1222200122121} is an apocalyptic number.

1222200122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222200122121 is a deficient number, since it is larger than the sum of its proper divisors (819546867447).

1222200122121 is a wasteful number, since it uses less digits than its factorization.

1222200122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763342 (or 10763339 counting only the distinct ones).

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

Adding to 1222200122121 its reverse (1212210022221), we get a palindrome (2434410144342).

The spelling of 1222200122121 in words is "one trillion, two hundred twenty-two billion, two hundred million, one hundred twenty-two thousand, one hundred twenty-one".