1222120210021 has 8 divisors (see below), whose sum is σ = 1228595503104. Its totient is φ = 1215645716880.

The previous prime is 1222120210007. The next prime is 1222120210033. The reversal of 1222120210021 is 1200120212221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222120210021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222120209977 and 1222120210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222120210121) 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 7 ways as a sum of consecutive naturals, for example, 2998735 + ... + 3381811.

It is an arithmetic number, because the mean of its divisors is an integer number (153574437888).

Almost surely, 2^{1222120210021} is an apocalyptic number.

It is an amenable number.

1222120210021 is a deficient number, since it is larger than the sum of its proper divisors (6475293083).

1222120210021 is a wasteful number, since it uses less digits than its factorization.

1222120210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399971.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1222120210021 its reverse (1200120212221), we get a palindrome (2422240422242).

The spelling of 1222120210021 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred ten thousand, twenty-one".