1222102212021 has 12 divisors (see below), whose sum is σ = 1869097500972. Its totient is φ = 766809230976.

The previous prime is 1222102212017. The next prime is 1222102212047. The reversal of 1222102212021 is 1202122012221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 929652714225 + 292449497796 = 964185^2 + 540786^2 .

It is not a de Polignac number, because 1222102212021 - 2² = 1222102212017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222102211985 and 1222102212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222102212061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3993797926 + ... + 3993798231.

It is an arithmetic number, because the mean of its divisors is an integer number (155758125081).

Almost surely, 2^{1222102212021} is an apocalyptic number.

It is an amenable number.

1222102212021 is a deficient number, since it is larger than the sum of its proper divisors (646995288951).

1222102212021 is a wasteful number, since it uses less digits than its factorization.

1222102212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7987596180 (or 7987596177 counting only the distinct ones).

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

Adding to 1222102212021 its reverse (1202122012221), we get a palindrome (2424224224242).

The spelling of 1222102212021 in words is "one trillion, two hundred twenty-two billion, one hundred two million, two hundred twelve thousand, twenty-one".