200120201111221 has 2 divisors, whose sum is σ = 200120201111222. Its totient is φ = 200120201111220.

The previous prime is 200120201111183. The next prime is 200120201111227. The reversal of 200120201111221 is 122111102021002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189068825052900 + 11051376058321 = 13750230^2 + 3324361^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120201111221 - 2⁷ = 200120201111093 is a prime.

It is a super-2 number, since 2×200120201111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200120201111195 and 200120201111204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200120201111227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060100555610 + 100060100555611.

It is an arithmetic number, because the mean of its divisors is an integer number (100060100555611).

Almost surely, 2^{200120201111221} is an apocalyptic number.

It is an amenable number.

200120201111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120201111221 is an equidigital number, since it uses as much as digits as its factorization.

200120201111221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200120201111221 its reverse (122111102021002), we get a palindrome (322231303132223).

The spelling of 200120201111221 in words is "two hundred trillion, one hundred twenty billion, two hundred one million, one hundred eleven thousand, two hundred twenty-one".