201200111221 has 2 divisors, whose sum is σ = 201200111222. Its totient is φ = 201200111220.

The previous prime is 201200111207. The next prime is 201200111249. The reversal of 201200111221 is 122111002102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125787262225 + 75412848996 = 354665^2 + 274614^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200111221 - 2¹³ = 201200103029 is a prime.

It is a super-2 number, since 2×201200111221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201200111291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600055610 + 100600055611.

It is an arithmetic number, because the mean of its divisors is an integer number (100600055611).

Almost surely, 2^201200111221 is an apocalyptic number.

It is an amenable number.

201200111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201200111221 is an equidigital number, since it uses as much as digits as its factorization.

201200111221 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 13.

Adding to 201200111221 its reverse (122111002102), we get a palindrome (323311113323).

The spelling of 201200111221 in words is "two hundred one billion, two hundred million, one hundred eleven thousand, two hundred twenty-one".