1110021201221 has 2 divisors, whose sum is σ = 1110021201222. Its totient is φ = 1110021201220.

The previous prime is 1110021201137. The next prime is 1110021201227. The reversal of 1110021201221 is 1221021200111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 867671757121 + 242349444100 = 931489^2 + 492290^2 .

It is an emirp because it is prime and its reverse (1221021200111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1110021201221 is a prime.

It is a super-2 number, since 2×1110021201221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1110021201196 and 1110021201205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110021201227) 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 as a sum of consecutive naturals, namely, 555010600610 + 555010600611.

It is an arithmetic number, because the mean of its divisors is an integer number (555010600611).

Almost surely, 2^{1110021201221} is an apocalyptic number.

It is an amenable number.

1110021201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110021201221 is an equidigital number, since it uses as much as digits as its factorization.

1110021201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1110021201221 its reverse (1221021200111), we get a palindrome (2331042401332).

The spelling of 1110021201221 in words is "one trillion, one hundred ten billion, twenty-one million, two hundred one thousand, two hundred twenty-one".