1222120022121 has 16 divisors (see below), whose sum is σ = 1840229301120. Its totient is φ = 801390177360.

The previous prime is 1222120022119. The next prime is 1222120022143. The reversal of 1222120022121 is 1212200212221.

It is a happy number.

1222120022121 is a `hidden beast` number, since 1 + 2 + 221 + 200 + 221 + 21 = 666.

It is not a de Polignac number, because 1222120022121 - 2¹ = 1222120022119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1222120022094 and 1222120022103.

It is not an unprimeable number, because it can be changed into a prime (1222120022621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371012325 + ... + 371015618.

It is an arithmetic number, because the mean of its divisors is an integer number (115014331320).

Almost surely, 2^{1222120022121} is an apocalyptic number.

It is an amenable number.

1222120022121 is a deficient number, since it is larger than the sum of its proper divisors (618109278999).

1222120022121 is an equidigital number, since it uses as much as digits as its factorization.

1222120022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742028013 (or 742028007 counting only the distinct ones).

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

Adding to 1222120022121 its reverse (1212200212221), we get a palindrome (2434320234342).

The spelling of 1222120022121 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, twenty-two thousand, one hundred twenty-one".