1222020212121 has 24 divisors (see below), whose sum is σ = 1783789428096. Its totient is φ = 806083466400.

The previous prime is 1222020212069. The next prime is 1222020212141. The reversal of 1222020212121 is 1212120202221.

It is a happy number.

It is not a de Polignac number, because 1222020212121 - 2²¹ = 1222018114969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222020212094 and 1222020212103.

It is not an unprimeable number, because it can be changed into a prime (1222020212141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 943056 + ... + 1825758.

It is an arithmetic number, because the mean of its divisors is an integer number (74324559504).

Almost surely, 2^{1222020212121} is an apocalyptic number.

It is an amenable number.

1222020212121 is a deficient number, since it is larger than the sum of its proper divisors (561769215975).

1222020212121 is a wasteful number, since it uses less digits than its factorization.

1222020212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884333 (or 884330 counting only the distinct ones).

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

Adding to 1222020212121 its reverse (1212120202221), we get a palindrome (2434140414342).

The spelling of 1222020212121 in words is "one trillion, two hundred twenty-two billion, twenty million, two hundred twelve thousand, one hundred twenty-one".