1222222110021 has 12 divisors (see below), whose sum is σ = 1925925749280. Its totient is φ = 740740672680.

The previous prime is 1222222110017. The next prime is 1222222110023. The reversal of 1222222110021 is 1200112222221.

It is a happy number.

It is not a de Polignac number, because 1222222110021 - 2² = 1222222110017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222222109976 and 1222222110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222222110023) 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 11 ways as a sum of consecutive naturals, for example, 6172838841 + ... + 6172839038.

It is an arithmetic number, because the mean of its divisors is an integer number (160493812440).

Almost surely, 2^{1222222110021} is an apocalyptic number.

1222222110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222222110021 is a deficient number, since it is larger than the sum of its proper divisors (703703639259).

1222222110021 is a wasteful number, since it uses less digits than its factorization.

1222222110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12345677896 (or 12345677893 counting only the distinct ones).

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

Adding to 1222222110021 its reverse (1200112222221), we get a palindrome (2422334332242).

The spelling of 1222222110021 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred ten thousand, twenty-one".