1222120021121 has 2 divisors, whose sum is σ = 1222120021122. Its totient is φ = 1222120021120.

The previous prime is 1222120021007. The next prime is 1222120021147. The reversal of 1222120021121 is 1211200212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1176279070096 + 45840951025 = 1084564^2 + 214105^2 .

It is an emirp because it is prime and its reverse (1211200212221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222120021121 is a prime.

It is a super-3 number, since 3×1222120021121³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1222120021121.

It is not a weakly prime, because it can be changed into another prime (1222120021721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611060010560 + 611060010561.

It is an arithmetic number, because the mean of its divisors is an integer number (611060010561).

Almost surely, 2^{1222120021121} is an apocalyptic number.

It is an amenable number.

1222120021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222120021121 is an equidigital number, since it uses as much as digits as its factorization.

1222120021121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222120021121 its reverse (1211200212221), we get a palindrome (2433320233342).

The spelling of 1222120021121 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, twenty-one thousand, one hundred twenty-one".